Could you test the latest version of the Reply tool on the Beta Cluster? The instructions are at Talk pages project/replying/prototype testing#Reply tool version 2.0. Click on https://w.wiki/RZf to post your feedback. (That link is a little slow for me, but it loads the list of questions.) Thank you for your help.
Topic on User talk:Aram
Hello @Whatamidoing (WMF): Thank you for your message! I did just a simple edit. After that, I wanted to make another edit with a longer content, but there was a problem. Before saving it, i changed the visual mode to source mode, then visual mode again; everything is gone!
Well, that's bad. Did you have anything "strange" in the reply box when you switched it?
No, Just i added about 1,000 bytes, then switched it twice. That's all.