diff --git a/src/vs/editor/contrib/inlineCompletions/browser/inlineCompletionsModel.ts b/src/vs/editor/contrib/inlineCompletions/browser/inlineCompletionsModel.ts
index 5a99aa34773..e7870b9c77d 100644
--- a/src/vs/editor/contrib/inlineCompletions/browser/inlineCompletionsModel.ts
+++ b/src/vs/editor/contrib/inlineCompletions/browser/inlineCompletionsModel.ts
@@ -569,6 +569,7 @@ export class UpdateOperation implements IDisposable {
 */
 export class SynchronizedInlineCompletionsCache extends Disposable {
 	public readonly completions: readonly CachedInlineCompletion[];
+	private isDisposing = false;
 
 	constructor(
 		completionsSource: TrackedInlineCompletions,
@@ -588,6 +589,7 @@ export class SynchronizedInlineCompletionsCache extends Disposable {
 			}))
 		);
 		this._register(toDisposable(() => {
+			this.isDisposing = true;
 			editor.deltaDecorations(decorationIds, []);
 		}));
 
@@ -600,7 +602,11 @@ export class SynchronizedInlineCompletionsCache extends Disposable {
 		this._register(completionsSource);
 	}
 
-	public updateRanges() {
+	public updateRanges(): void {
+		if (this.isDisposing) {
+			return;
+		}
+
 		let hasChanged = false;
 		const model = this.editor.getModel();
 		for (const c of this.completions) {