So far at least two of us have a problem with this. When scrolling down the list of categories in Youtube (not Youtube TV), the notification sound ends in an annoying crackle. Worse than fingernails on a chalkboard in my opinion.
I created this post to separate it from another post.
Fire TV 4K hooked to a Yamaha 5.1 receiver in my case.
Sound off if you started experiencing this recently. Just don't make that crackling sound.