I cannot edit my post? That’s odd, and frustrating!
FWIW, I’m running Google Chrome Version 116.0.5845.110 (Official Build) (x86_64) on macOS Mojave 10.14.6 (18G9323), and seeing this behavior on this site as well as the one I was originally working on.
I do have a number of browser extensions installed, but this behavior isn’t seen in text entry boxes on any other sites, so I’m comfortable blaming it on Discourse.
It would be great to at least get an ack, even if nobody thinks this is worth fixing quickly if at all.