Thanks to a comment by @LargeHardonCollider@lemmy.world , I checked and saw that ‘Federation debugging’ mode was enabled. I had enabled that when the server just started (less than 3 weeks ago) and I had an issue with federation.
I thought I had switched that off again, but apparently not. This mode causes the federation to be done in the foreground, so your ‘Post’ or ‘Comment’ action will wait for that to finish…
This solves the most annoying issue, and makes the site way more useable. There are many other issues, but we’ll get there.
I found an odd bug.
I tried creating a comment on a pc browser here:
https://lemmy.world/post/188235?scrollToComments=true
And had the endless circle.
Used Jerboa on android and it gave an error: “that language is not allowed”. So I went back to the browser and chose english and it worked.
I can post on other posts, though.
That happens when replying to people on instances with strict languages rules (e.g. Kbin)