I don't think this is performance related. Looks like some kind of timeout on a page or cookie or stuff like this.
It is frustrating because sometimes I just don't realize how long did it take me to write the post or get distracted... and I wish there was a way to figure out how to get rid of this problem on your side instead of going thru the copy and paste in case I went over the time limit.
Do you get a log entry if someone gets 'blanked out' when replying to a post?
Maybe the problem happens more often then the posts would suggest.
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