Another thing to note for the #GoToSocial upgrade is that I ran 16.0 using a ssystemd MemoryMax of 200M; today the upgraded instance with 17.1 ran fine for a while and then locked up. A restart didn't bring it back. It remained stuck after a log message saying something about compiling WebAssembly. I increased MemoryMax to 300M, no change. I increased it to 500M and the instance came up. Just in case you're as memory-stingy as I am...
Another strange effect of my #GoToSocial upgrade, perhaps coupled with my other problems – and I really don’t know who is to blame: the Toot! app I use just showed me all my recent direct conversations as “new” (with those weird bubbles along the left side). I don’t think the Mastodon Client protocol offers a “seen” flag so perhaps the messages all got new ids? I have no idea. It’s not very annoying just surprising.