Since updating to Android 11 (Samsung One UI 3.1) Yatse now plays a notification sound whenever an item is played, paused, or resumed. Yatse is the only media player doing this, it had never done it before in the years I’ve used Yatse, and I can’t find any setting to stop it happening.
This is not from Yatse.
On normal Android you can swipe left/right the notification and press the gear item to configure notification. But since Yatse does not set sounds on those it’s probably something else on your device that react to Yatse notifications.