diff --git a/packages/main/cypress/specs/MultiComboBox.cy.tsx b/packages/main/cypress/specs/MultiComboBox.cy.tsx
index 04c109fa59af..f038ee6497ae 100644
--- a/packages/main/cypress/specs/MultiComboBox.cy.tsx
+++ b/packages/main/cypress/specs/MultiComboBox.cy.tsx
@@ -4153,180 +4153,141 @@ describe("Keyboard Handling", () => {
 });
 
 describe("MultiComboBox Composition", () => {
-	it("should handle Korean composition correctly", () => {
+	const mountMultiComboBox = (children: any, id: string, placeholder: string = "") => {
 		cy.mount(
-			<MultiComboBox
-				id="multicombobox-composition-korean"
-				placeholder="Type in Korean ..."
-			>
-				<MultiComboBoxItem text="안녕하세요" />
-				<MultiComboBoxItem text="고맙습니다" />
-				<MultiComboBoxItem text="사랑" />
-				<MultiComboBoxItem text="한국" />
+			<MultiComboBox id={id} placeholder={placeholder}>
+				{children}
 			</MultiComboBox>
 		);
-
-		cy.get("[ui5-multi-combobox]")
-			.as("multicombobox")
-			.realClick();
-
-		cy.get("@multicombobox")
-			.shadow()
-			.find("input")
-			.as("nativeInput")
-			.focus();
-
-		cy.get("@nativeInput").trigger("compositionstart", { data: "" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionupdate", { data: "사랑" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionend", { data: "사랑" });
-
-		cy.get("@nativeInput")
-			.invoke("val", "사랑")
+		cy.get("[ui5-multi-combobox]").as("mcb").realClick();
+		cy.get("@mcb").shadow().find("input").as("input").focus();
+	};
+
+	const simulateCompositionStages = (stages: string[], final: string) => {
+		cy.get("@input").trigger("compositionstart", { data: "" });
+		stages.forEach(stage => {
+			cy.get("@input")
+				.invoke("val", stage)
+				.trigger("input", { inputType: "insertCompositionText" })
+				.trigger("compositionupdate", { data: stage });
+
+			cy.get("@mcb").should("have.prop", "_isComposing", true);
+			cy.get("@input").should("have.value", stage);
+			cy.get("@mcb").should("have.attr", "value", stage);
+			cy.get("@mcb").should("have.attr", "value-state", "None");
+		});
+		cy.get("@input")
+			.trigger("compositionend", { data: final })
+			.invoke("val", final)
 			.trigger("input", { inputType: "insertCompositionText" });
+		cy.get("@mcb").should("have.prop", "_isComposing", false);
+	};
 
-		cy.get("@multicombobox").should("have.prop", "_isComposing", false);
+	it("IME Korean matching suggestion", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="사랑" />,
+			<MultiComboBoxItem key="2" text="사랑해요" />,
+			<MultiComboBoxItem key="3" text="한국" />,
+		], "mcb-korean", "Type in Korean ...");
 
-		cy.get("@multicombobox").should("have.attr", "value", "사랑");
+		simulateCompositionStages(["ㅅ", "사", "사랑"], "사랑");
 
-		cy.get("@multicombobox")
+		cy.get("@mcb")
 			.shadow()
-			.find<ResponsivePopover>("[ui5-responsive-popover]")
-			.as("popover")
+			.find<ResponsivePopover>("ui5-responsive-popover")
 			.ui5ResponsivePopoverOpened();
 
-		cy.get("@multicombobox")
-			.realPress("Enter");
-
-		cy.get("@multicombobox")
+		cy.get("@mcb").realPress("Enter");
+		cy.get("@mcb")
 			.shadow()
-			.find("[ui5-tokenizer]")
-			.find("[ui5-token]")
+			.find("[ui5-tokenizer] [ui5-token]")
 			.should("have.length", 1);
-
-		cy.get("@multicombobox").should("have.attr", "value", "");
+		cy.get("@mcb").should("have.attr", "value", "");
 	});
 
-	it("should handle Japanese composition correctly", () => {
-		cy.mount(
-			<MultiComboBox
-				id="multicombobox-composition-japanese"
-				placeholder="Type in Japanese ..."
-			>
-				<MultiComboBoxItem text="こんにちは" />
-				<MultiComboBoxItem text="ありがとう" />
-				<MultiComboBoxItem text="東京" />
-				<MultiComboBoxItem text="日本" />
-			</MultiComboBox>
-		);
+	it("IME Korean non-matching – error state after commit", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="사랑" />,
+			<MultiComboBoxItem key="2" text="한국" />,
+		], "mcb-ko-non", "Type in Korean ...");
 
-		cy.get("[ui5-multi-combobox]")
-			.as("multicombobox")
-			.realClick();
+		simulateCompositionStages(["ㄲ", "ㄲㅏ"], "까");
 
-		cy.get("@multicombobox")
+		cy.get("@mcb").should("have.attr", "value-state", "Negative");
+		cy.get("@input").should("have.value", "");
+		cy.get("@mcb")
 			.shadow()
-			.find("input")
-			.as("nativeInput")
-			.focus();
-
-		cy.get("@nativeInput").trigger("compositionstart", { data: "" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionupdate", { data: "ありがとう" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionend", { data: "ありがとう" });
-
-		cy.get("@nativeInput")
-			.invoke("val", "ありがとう")
-			.trigger("input", { inputType: "insertCompositionText" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", false);
+			.find("[ui5-tokenizer] [ui5-token]")
+			.should("have.length", 0);
+	});
 
-		cy.get("@multicombobox").should("have.attr", "value", "ありがとう");
+	it("IME Japanese matching – multi-stage selection", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="ありがとう" />,
+			<MultiComboBoxItem key="2" text="こんにちは" />,
+			<MultiComboBoxItem key="3" text="東京" />,
+		], "mcb-ja", "Type in Japanese ...");
 
-		cy.get("@multicombobox")
+		simulateCompositionStages(["あ", "あり", "ありが", "ありがとう"], "ありがとう");
+		cy.get("@mcb")
 			.shadow()
-			.find<ResponsivePopover>("[ui5-responsive-popover]")
-			.as("popover")
+			.find<ResponsivePopover>("ui5-responsive-popover")
 			.ui5ResponsivePopoverOpened();
-
-		cy.get("@multicombobox")
-			.realPress("Enter");
-
-		cy.get("@multicombobox")
+		cy.get("@mcb").realPress("Enter");
+		cy.get("@mcb")
 			.shadow()
-			.find("[ui5-tokenizer]")
-			.find("[ui5-token]")
+			.find("[ui5-tokenizer] [ui5-token]")
 			.should("have.length", 1);
-
-		cy.get("@multicombobox").should("have.attr", "value", "");
 	});
 
-	it("should handle Chinese composition correctly", () => {
-		cy.mount(
-			<MultiComboBox
-				id="multicombobox-composition-chinese"
-				placeholder="Type in Chinese ..."
-			>
-				<MultiComboBoxItem text="你好" />
-				<MultiComboBoxItem text="谢谢" />
-				<MultiComboBoxItem text="北京" />
-				<MultiComboBoxItem text="中国" />
-			</MultiComboBox>
-		);
+	it("IME Japanese non-matching – error state after commit", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="ありがとう" />,
+			<MultiComboBoxItem key="2" text="こんにちは" />,
+		], "mcb-ja-non", "Type in Japanese ...");
 
-		cy.get("[ui5-multi-combobox]")
-			.as("multicombobox")
-			.realClick();
-
-		cy.get("@multicombobox")
+		simulateCompositionStages(["ず", "ずx"], "ずx");
+		cy.get("@mcb").should("have.attr", "value-state", "Negative");
+		cy.get("@input").should("have.value", "");
+		cy.get("@mcb")
 			.shadow()
-			.find("input")
-			.as("nativeInput")
-			.focus();
-
-		cy.get("@nativeInput").trigger("compositionstart", { data: "" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionupdate", { data: "谢谢" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", true);
-
-		cy.get("@nativeInput").trigger("compositionend", { data: "谢谢" });
-
-		cy.get("@nativeInput")
-			.invoke("val", "谢谢")
-			.trigger("input", { inputType: "insertCompositionText" });
-
-		cy.get("@multicombobox").should("have.prop", "_isComposing", false);
+			.find("[ui5-tokenizer] [ui5-token]")
+			.should("have.length", 0);
+	});
 
-		cy.get("@multicombobox").should("have.attr", "value", "谢谢");
+	it("IME Chinese matching – preserves pinyin stages & selects", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="你好" />,
+			<MultiComboBoxItem key="2" text="谢谢" />,
+			<MultiComboBoxItem key="3" text="谢谢你" />,
+			<MultiComboBoxItem key="4" text="北京" />,
+		], "mcb-zh", "Type in Chinese ...");
 
-		cy.get("@multicombobox")
+		simulateCompositionStages(["x", "xi", "xie", "xiex", "xiexie"], "谢谢");
+		cy.get("@mcb")
 			.shadow()
-			.find<ResponsivePopover>("[ui5-responsive-popover]")
-			.as("popover")
+			.find<ResponsivePopover>("ui5-responsive-popover")
 			.ui5ResponsivePopoverOpened();
-
-		cy.get("@multicombobox")
-			.realPress("Enter");
-
-		cy.get("@multicombobox")
+		cy.get("@mcb").realPress("Enter");
+		cy.get("@mcb")
 			.shadow()
-			.find("[ui5-tokenizer]")
-			.find("[ui5-token]")
+			.find("[ui5-tokenizer] [ui5-token]")
 			.should("have.length", 1);
+		cy.get("@mcb").should("have.attr", "value", "");
+	});
+
+	it("IME Chinese non-matching – error state after commit", () => {
+		mountMultiComboBox([
+			<MultiComboBoxItem key="1" text="你好" />,
+			<MultiComboBoxItem key="2" text="谢谢" />,
+		], "mcb-zh-non", "Type in Chinese ...");
 
-		cy.get("@multicombobox").should("have.attr", "value", "");
+		simulateCompositionStages(["p", "pi", "pin"], "品味");
+		cy.get("@mcb").should("have.attr", "value-state", "Negative");
+		cy.get("@input").should("have.value", "");
+		cy.get("@mcb")
+			.shadow()
+			.find("[ui5-tokenizer] [ui5-token]")
+			.should("have.length", 0);
 	});
 });
diff --git a/packages/main/src/MultiComboBox.ts b/packages/main/src/MultiComboBox.ts
index 3fd6d49e6656..15fb35bf27a7 100644
--- a/packages/main/src/MultiComboBox.ts
+++ b/packages/main/src/MultiComboBox.ts
@@ -729,7 +729,7 @@ class MultiComboBox extends UI5Element implements IFormInputElement {
 
 		this._effectiveValueState = this.valueState;
 
-		if (!filteredItems.length && value && !this.noValidation) {
+		if (!this._isComposing && !filteredItems.length && value && !this.noValidation) {
 			const newValue = this.valueBeforeAutoComplete || this._inputLastValue;
 
 			input.value = newValue;
@@ -742,7 +742,10 @@ class MultiComboBox extends UI5Element implements IFormInputElement {
 			return;
 		}
 
-		this._inputLastValue = input.value;
+		if (!this._isComposing) {
+			this._inputLastValue = input.value;
+		}
+
 		this.value = input.value;
 		this._filteredItems = filteredItems;
 
@@ -1749,8 +1752,6 @@ class MultiComboBox extends UI5Element implements IFormInputElement {
 
 		this._effectiveShowClearIcon = (this.showClearIcon && !!this.value && !this.readonly && !this.disabled);
 
-		this._inputLastValue = value;
-
 		if (input && !input.value) {
 			this.valueBeforeAutoComplete = "";
 			this._filteredItems = this._getItems();
@@ -1773,10 +1774,10 @@ class MultiComboBox extends UI5Element implements IFormInputElement {
 		if (this._shouldAutocomplete && !isAndroid()) {
 			const item = this._getFirstMatchingItem(value);
 
-			// Keep the original typed in text intact
-			this.valueBeforeAutoComplete = value;
 			// Prevent typeahead during composition to avoid interfering with the composition process
 			if (!this._isComposing && item) {
+				// Keep the original typed in text intact
+				this.valueBeforeAutoComplete = value;
 				this._handleTypeAhead(item, value);
 			}
 		}
diff --git a/packages/main/test/pages/MultiComboBox.html b/packages/main/test/pages/MultiComboBox.html
index 69c7593a7598..2e3c384eefe6 100644
--- a/packages/main/test/pages/MultiComboBox.html
+++ b/packages/main/test/pages/MultiComboBox.html
@@ -325,6 +325,18 @@ <h3>MultiComboBox Composition</h3>
 			</ui5-multi-combobox>
 		</div>
 
+		<div class="demo-section">
+			<span>MultiComboBox Composition Korean with Validation</span>
+
+			<br>
+			<ui5-multi-combobox placeholder="Type in Korean ..." id="mcb-composition-korean">
+				<ui5-mcb-item text="안녕하세요"></ui5-mcb-item>
+				<ui5-mcb-item text="고맙습니다"></ui5-mcb-item>
+				<ui5-mcb-item text="사랑"></ui5-mcb-item>
+				<ui5-mcb-item text="한국"></ui5-mcb-item>
+			</ui5-multi-combobox>
+		</div>
+
 		<div class="demo-section">
 			<span>MultiComboBox Composition Japanese</span>
 
@@ -349,6 +361,18 @@ <h3>MultiComboBox Composition</h3>
 			</ui5-multi-combobox>
 		</div>
 
+		<div class="demo-section">
+			<span>MultiComboBox Composition Chinese with Validation</span>
+
+			<br>
+			<ui5-multi-combobox placeholder="Type in Chinese ..." id="mcb-composition-chinese">
+				<ui5-mcb-item text="你好"></ui5-mcb-item>
+				<ui5-mcb-item text="謝謝"></ui5-mcb-item>
+				<ui5-mcb-item text="北京"></ui5-mcb-item>
+				<ui5-mcb-item text="上海"></ui5-mcb-item>
+			</ui5-multi-combobox>
+		</div>
+
 	</section>
 
 	<div class="demo-section">