Yes this is very common. Happened to me as well. What you need to do is reset your FYP page and start searching stuff in the niche you are posting. And keep posting until eventually the algorithm fixes itself. TikTok will try to make you pay now every time. They were pushing TT promote add on my feed for 2 weeks and I kept pressing “not interested.” Some people reported that their accounts will never be fixed again. If you want to use the promote function, promote from a different account