Just thought I'd share this, in case there was anything useful from the info...
Firstly, no, I'm not an employee. Secondly, no, I don't want to be a moderator. Thirdly, I'm ok with the clown emoji 🙂
With that out of the way...
This evening I saw a post (https://discord.com/channels/462177898695229442/1067180356731674705 <- BIG thank you!) here that mentioned clearing the %appdata% directly for Catan (for Windows users). Having done that, I was able to both use the in-game Chat and also place towns again, which I hadn't been able to do for approximate 3-4 weeks. I have just finished the game, without significant issue.
Details:
I play on my laptop, Windows 10, via the Steam app, I was player 1. Based in UK.
Player 2 didn't state what platform they were using, or where they were from.
Player 3 indicated they were playing via their iPhone and were in Germany.
The game ended just after 10pm UK time.
Game mode was Ore for Wool.
The little swirly progress icon appeared quite a few times (bottom right hand corner of the screen) specifically for player 2 but on occasion also for player 3, but less frequently.
Player 2 had two occasions where their turn-timer rolled back, this was behaviour I had experienced before the migration, and wasn't a big issue, it wasn't a big issue this evening either. Unlikely pre-migration, the turn timer didn't get all the way around, it was more like a short delay/lag, that then quickly resolved itself, I'd estimate about a quarter of the turn-timer max.