Why use TOR at the first place anyway? Can't you use normally? I never used TOR. So I never faced anything like that. Sometimes I would get random time outs or verification failed but not that you got.
Using TOR to access the forum is normal, not abnormal. Satoshi Nakamoto always use TOR in Bitcointalk so is Satoshi Nakamoto an abnormal user?
I'll probably release Satoshi's PMs and logged IPs addresses in ~8 years. This'd probably be of great historical interest. (Though he always used Tor, as far as I can tell.)
OP can use Ctrl+Shift+L or click on hamburger icon and choose New Tor circuit for this site. It can help to resolve the connection issue when using Tor.