diff --git a/plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/customization/CodeWhispererModelConfigurator.kt b/plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/customization/CodeWhispererModelConfigurator.kt
index 8a94288b937..b47e90b6557 100644
--- a/plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/customization/CodeWhispererModelConfigurator.kt
+++ b/plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/customization/CodeWhispererModelConfigurator.kt
@@ -90,9 +90,7 @@ class DefaultCodeWhispererModelConfigurator : CodeWhispererModelConfigurator, Pe
             QRegionProfileSelectedListener.TOPIC,
             object : QRegionProfileSelectedListener {
                 override fun onProfileSelected(project: Project, profile: QRegionProfile?) {
-                    pluginAwareExecuteOnPooledThread {
-                        CodeWhispererModelConfigurator.getInstance().listCustomizations(project, passive = true)
-                    }
+                    switchCustomization(project, null)
                 }
             }
         )
diff --git a/plugins/amazonq/codewhisperer/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/codewhisperer/CodeWhispererModelConfiguratorTest.kt b/plugins/amazonq/codewhisperer/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/codewhisperer/CodeWhispererModelConfiguratorTest.kt
index d6900a556cb..c9d019693c9 100644
--- a/plugins/amazonq/codewhisperer/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/codewhisperer/CodeWhispererModelConfiguratorTest.kt
+++ b/plugins/amazonq/codewhisperer/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/codewhisperer/CodeWhispererModelConfiguratorTest.kt
@@ -615,7 +615,7 @@ class CodeWhispererModelConfiguratorTest {
     }
 
     @Test
-    fun `profile switch should keep using existing customization if new list still contains that arn`() {
+    fun `should switch to default customization on profile changed`() {
         val ssoConn = spy(LegacyManagedBearerSsoConnection(region = "us-east-1", startUrl = "url 1", scopes = Q_SCOPES))
         ToolkitConnectionManager.getInstance(projectRule.project).switchConnection(ssoConn)
         val oldCustomization = CodeWhispererCustomization("oldArn", "oldName", "oldDescription")
@@ -632,7 +632,7 @@ class CodeWhispererModelConfiguratorTest {
             .syncPublisher(QRegionProfileSelectedListener.TOPIC)
             .onProfileSelected(projectRule.project, null)
 
-        assertThat(sut.activeCustomization(projectRule.project)).isEqualTo(oldCustomization)
+        assertThat(sut.activeCustomization(projectRule.project)).isEqualTo(null)
     }
 
     @Test