Change:
The lastResponse property is checked before unsetting the hasReceivedRequest_ field
This won't happen if happens
AFAIK this will still happen: when having two equal responses (which is the default for inline chat), is only played once.

Discussion:
export interface IChatAccessibilityService { readonly _serviceBrand: undefined; <del> acceptRequest(): void; acceptResponse(response?: IChatResponseViewModel | string): void; </del> <ins> acceptRequest(): number; acceptResponse(response: IChatResponseViewModel | string | undefined, requestId: number): void; </ins> } export interface IChatCodeBlockInfo {

declare readonly _serviceBrand: undefined; <del> private _responsePendingAudioCue: IDisposable | undefined; private _hasReceivedRequest: boolean = false; </del> <ins> private _pendingCueMap: Map<number, IDisposable | undefined> = new Map(); </ins> private _runOnceScheduler: RunOnceScheduler; private _lastResponse: string | undefined; <ins> private _requestId: number = 0; </ins> constructor(@IAudioCueService private readonly _audioCueService: IAudioCueService) { super(); this._register(this._runOnceScheduler = new RunOnceScheduler(() => { <del> if (!this._hasReceivedRequest) { this._responsePendingAudioCue = this._audioCueService.playAudioCueLoop(AudioCue.chatResponsePending, CHAT_RESPONSE_PENDING_AUDIO_CUE_LOOP_MS); } </del> <ins> this._pendingCueMap.set(this._requestId, this._audioCueService.playAudioCueLoop(AudioCue.chatResponsePending, CHAT_RESPONSE_PENDING_AUDIO_CUE_LOOP_MS)); </ins> }, CHAT_RESPONSE_PENDING_ALLOWANCE_MS)); } <del> acceptRequest(): void { </del> <ins> acceptRequest(): number { this._requestId++; </ins> this._audioCueService.playAudioCue(AudioCue.chatRequestSent, { allowManyInParallel: true }); this._runOnceScheduler.schedule(); <ins> return this._requestId; </ins> } <del> acceptResponse(response?: IChatResponseViewModel | string): void { this._hasReceivedRequest = true; </del> <ins> acceptResponse(response: IChatResponseViewModel | string | undefined, requestId: number): void { this._pendingCueMap.get(requestId)?.dispose(); this._pendingCueMap.delete(requestId); </ins> const isPanelChat = typeof response !== 'string'; <del> this._responsePendingAudioCue?.dispose(); </del> this._runOnceScheduler?.cancel(); const responseContent = typeof response === 'string' ? response : response?.response.asString(); if (this._lastResponse === responseContent) { return; } this._audioCueService.playAudioCue(AudioCue.chatResponseReceived, { allowManyInParallel: true }); <del> this._hasReceivedRequest = false; </del> if (!response) { return; }

this._onDidAcceptInput.fire(); const editorValue = this.getInput(); <del> this._chatAccessibilityService.acceptRequest(); </del> <ins> const requestId = this._chatAccessibilityService.acceptRequest(); </ins> const input = !opts ? editorValue : 'query' in opts ? opts.query : `${opts.prefix} ${editorValue}`;

result.responseCompletePromise.then(async () => { const responses = this.viewModel?.getItems().filter(isResponseVM); const lastResponse = responses?.[responses.length - 1]; <del> this._chatAccessibilityService.acceptResponse(lastResponse); </del> <ins> this._chatAccessibilityService.acceptResponse(lastResponse, requestId); </ins> }); } else { <del> this._chatAccessibilityService.acceptResponse(); </del> <ins> this._chatAccessibilityService.acceptResponse(undefined, requestId); </ins> } } }

let a11yResponse: string | undefined; const a11yVerboseInlineChat = this._configurationService.getValue<boolean>('accessibility.verbosity.inlineChat') === true; <del> this._chatAccessibilityService.acceptRequest(); </del> <ins> const requestId = this._chatAccessibilityService.acceptRequest(); </ins> const task = this._activeSession.provider.provideResponse(this._activeSession.session, request, progress, requestCts.token); this._log('request started', this._activeSession.provider.debugName, this._activeSession.session, request);

this._zone.value.widget.updateInfo(''); this._zone.value.widget.updateToolbar(true); this._log('request took', requestClock.elapsed(), this._activeSession.provider.debugName); <del> this._chatAccessibilityService.acceptResponse(a11yResponse); </del> <ins> this._chatAccessibilityService.acceptResponse(a11yResponse, requestId); </ins> } progressiveEditsCts.dispose(true);

} }], [IChatAccessibilityService, new class extends mock<IChatAccessibilityService>() { <del> override acceptResponse(response?: IChatResponseViewModel): void { } override acceptRequest(): void { } </del> <ins> override acceptResponse(response: IChatResponseViewModel | undefined, requestId: number): void { } override acceptRequest(): number { return -1; } </ins> }], [IAccessibleViewService, new class extends mock<IAccessibleViewService>() { override getOpenAriaHint(verbositySettingKey: AccessibilityVerbositySettingId): string | null {