I don’t mean the forum. The text field to post here (like this answer to you) in the forum works. However, copy and paste won’t work (at least with MS Edge), if you write a public message to someone using this website. HTML also does not work for messages either. But the last one I only tested with a private message so far.
The issue with copying text to the text box seems to be browser specific. Firefox allows an insert with “CTRL+C”. With MS Edge this does not work. I didn’t try HTML using both browsers yet. However, my guess is, if it comes to the other issue with HTML the browser should not matter at least.
Interesting, my firewall blocked the update process of MS Edge. So I had 87.0.664.66 in use. I corrected this and updated to the version 89.0.774.48. After that I tried two times to copy text into the textbox of a public message. The first time it worked, but not the second time. I kept trying and found out it has something to do with the loading state of the game. If the game has been not loaded completely, to insert text in the field with CTRL+C is possible, but not anymore, if the remote project has been loaded completely and is playable.