skip syncing if sync is in progress

src/vs/platform/userDataSync/common/userDataSyncService.ts

@@ -114,6 +114,10 @@ export class UserDataSyncService extends Disposable implements IUserDataSyncServ
 
 	async sync(): Promise<void> {
 		await this.checkEnablement();
+		if (this.status === SyncStatus.Syncing) {
+			this.logService.info(`Skipped synchronizing as sync is in progress.`);
+			return;
+		}
 		await this.syncThrottler.queue(() => this.doSync());
 	}