Did you “submit a support request”? I don’t know if people from the development team read these forums.
That definitely looks like a strange bug.
If you just had a wrong seed phrase, it should complain (if the checksum does not match) or show an empty wallet (if the checksum matches, but it’s still the wrong seed phrase), but it should not crash.
The only other instances of this message I can find are:
(Seems similar to your case. Unfortunately, we do not know if the support request was successful.)
(Don’t know if it is similar to your case. He talks about the 12 words being the restore phrase of a Trezor in an earlier post.)