I just got this message today. I didn’t remember to take a screenshot but I will if it happens again (and it’s happened before iirc) It stopped me from editing my post because “another user” was already editing it. The post wasn’t a wiki.
I was able to edit the post, but it showed this icon: which usually doesn’t appear when I edit right after posting.
Is this a glitch with the system or should I be treating it like a security issue? Anyone else get this message?