clear most recent prompt value input on input finished (microsoft#241666)

Author: meganrogge

src/vs/workbench/contrib/terminalContrib/suggest/browser/terminalSuggestAddon.ts

@@ -162,7 +162,10 @@ export class SuggestAddon extends Disposable implements ITerminalAddon, ISuggest
 					this._promptInputModel = commandDetection.promptInputModel;
 					this._promptInputModelSubscriptions.value = combinedDisposable(
 						this._promptInputModel.onDidChangeInput(e => this._sync(e)),
-						this._promptInputModel.onDidFinishInput(() => this.hideSuggestWidget(true)),
+						this._promptInputModel.onDidFinishInput(() => {
+							this._mostRecentPromptInputState = undefined;
+							this.hideSuggestWidget(true);
+						}),
 					);
 					if (this._shouldSyncWhenReady) {
 						this._sync(this._promptInputModel);