diff --git a/core/block_svg.ts b/core/block_svg.ts
index ca25560fd01..ea5dd7da7ed 100644
--- a/core/block_svg.ts
+++ b/core/block_svg.ts
@@ -55,6 +55,7 @@ import type {IPathObject} from './renderers/common/i_path_object.js';
 import * as blocks from './serialization/blocks.js';
 import type {BlockStyle} from './theme.js';
 import * as Tooltip from './tooltip.js';
+import {idGenerator} from './utils.js';
 import {Coordinate} from './utils/coordinate.js';
 import * as dom from './utils/dom.js';
 import {Rect} from './utils/rect.js';
@@ -210,7 +211,9 @@ export class BlockSvg
 
     // Expose this block's ID on its top-level SVG group.
     this.svgGroup.setAttribute('data-id', this.id);
-    svgPath.id = this.id;
+
+    // The page-wide unique ID of this Block used for focusing.
+    svgPath.id = idGenerator.getNextUniqueId();
 
     this.doInit_();
   }
diff --git a/core/interfaces/i_focusable_node.ts b/core/interfaces/i_focusable_node.ts
index 6844e080941..b21d7741a5c 100644
--- a/core/interfaces/i_focusable_node.ts
+++ b/core/interfaces/i_focusable_node.ts
@@ -19,11 +19,13 @@ export interface IFocusableNode {
    * - blocklyActiveFocus
    * - blocklyPassiveFocus
    *
-   * The returned element must also have a valid ID specified, and unique to the
-   * element relative to its nearest IFocusableTree parent. It must also have a
-   * negative tabindex (since the focus manager itself will manage its tab index
-   * and a tab index must be present in order for the element to be focusable in
-   * the DOM).
+   * The returned element must also have a valid ID specified, and unique across
+   * the entire page. Failing to have a properly unique ID could result in
+   * trying to focus one node (such as via a mouse click) leading to another
+   * node with the same ID actually becoming focused by FocusManager. The
+   * returned element must also have a negative tabindex (since the focus
+   * manager itself will manage its tab index and a tab index must be present in
+   * order for the element to be focusable in the DOM).
    *
    * The returned element must be visible if the node is ever focused via
    * FocusManager.focusNode() or FocusManager.focusTree(). It's allowed for an
diff --git a/core/workspace_svg.ts b/core/workspace_svg.ts
index 5caa56818a2..3e8731afd4b 100644
--- a/core/workspace_svg.ts
+++ b/core/workspace_svg.ts
@@ -2759,7 +2759,9 @@ export class WorkspaceSvg
     }
 
     // Search for a specific block.
-    const block = this.getBlockById(id);
+    const block = this.getAllBlocks(false).find(
+      (block) => block.getFocusableElement().id === id,
+    );
     if (block) return block;
 
     // Search for a workspace comment (semi-expensive).