Well known issue. Take the time to read through comments or search for your issue, you are not alone and there are SEVERAL posts about this tiktok thing amongst other problems you may be having.
Maybe because it's an issue with the application because it's not fully compatible with beta software. Apps are going to stop working. It's just a fact of life when beta testing. Blame Tiktok for not fixing it.
My poorly sarcastic post was the fact I'm tired of the same posts over and over when these things have been talked about already in these forums. I'm starting to think most people have never been part of a forum before. Search people !