@MartynaK - this is an issue reported by many of us, and started with the beta (though, yes can be a tiktok android 12 related issue) Rebooting or clearing cache did not fix it. Crashes every few videos, and closes tiktok...
Latest beta seems to have resolved it. In fact, so far, latest beta is great all issues I reported seem resolved (the ones that can be checked easily) Nice one Samsung 👍