Ive had the same thing happening on my HA Container install for a very long time (maybe a year now?). Not nearly as bad as yours tho. Maybe once a week or so.
I’ve never been able to figure out why. I even posted a thread to ask about it and never got anywhere.
I just live with it now and have ip bans disabled.
Deleted the browser history from the machine that keeps logging the incorrect login
Deleted all refresh token(s) for the machine in question from HA, there were 17 refresh tokens for this machine and most likely the cause of this error.
Fresh login and now only see one refresh token for this machine and I have not see any incorrect login attempt error in 2 days.
The reason why this mess happened is that I normally use Brave browser for normal HA access but on certain occasion I used Chrome (for serial flashing over USB) or incognito mode when I am trying to say authorize Google Drive backup for HA (using my non-standard Google account). So ended up with multiple tokens which likely leads to an occasional mismatch and hence the error!
Coincidentally, I had never gone thru all of the refresh tokens to delete them until a few days ago. There were several there too. I deleted them all so we’ll see if it fixes the occasional login errors.