I keep getting logged out

I've no idea if this is the right place for this post but I'd at least like to know what the actual frickety frack is going on with my tiktok.

My tiktok has been acting up for a couple of days, it keeps randomly logging me out. I have multiple accounts, all connected to different things. I've always managed to get back in because as long as I re-log into one the rest are still there. I've never received any "reset password" emails/messages either. Only issue I've found when this happens is that if I choose to re-log into my ALREADY EXISTING account that's connected to my email, it creates me a brand new account. It also had disconnected the email on my already existing account and plopped it onto this unwanted new one. I had to get rid of the new account to be able to have it reconnect my email to the proper account. Why is this happening?