I had to call to get my password reset, after 3 or 4 failed attempts on the self service option. I did spend less than 10 minutes on hold, but I was able to finally get in (Thursday 12/23 @ 14:27 PST). My history all seems to be there (1 Form 1, 7 Form 4s, smattering of Form 3s.)
I tried doing a Form 4 as a test shortly afterwards, but it errored out at the Transferor screen, saying I need to be an SOT and the SOT Class drop down box didn't work. I used the "ask the expert" option and sent them a question about it. Haven't received a response yet, but I just logged in and started the edit on the draft Form 4, and now it seems to be working correctly and "63" is populated in the SOT Class drop down. But then I clicked around to a few different steps and came back to the Transferor screen, and now the SOT error is back.
My list of available items seems correct too, though I do see a suppressor listed that shouldn't be (F4 to customer was approved May 2018). I guess I need to call and ask about that.....
Overall, the system seems to be typical government: complete fucking trash.