It's someone (or a group of people) spamming fake servers onto the server list. Here's an earlier thread about the same issue: https://www.reddit.com/r/Barotrauma/comments/13thvdi/is_this_happening_to_anyone_else_or_just_me/
We are working on some countermeasures against these spam servers, but as mentioned in that earlier thread, it's unfortunately a somewhat tricky problem to solve. There's no easy way to automatically detect whether a server is legit...
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