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.
Thanks for the fix ! I also thought it was a general lemmy issue and not a lemmy.world one.
Edit : I seem to still have the “wheel keeps spinning, have to reload to see my comment posted” issue, is that the one you’re talking about here ? But tbf it was an issue I even already had on Reddit (mobile web) so I can’t be mad 😅