This has been around since at least June of this year, (I only got around to posting about it now) and I was told to take it up with the instance.

The lag is pretty severe, I recorded the video on a powerful computer but on my laptop it is impossible to write posts.

P.S. In the video you can see that I have lemmytools enabled, after recording I confirmed that it was still happening with all of my lemmy extensions and userscripts disabled.