I run my own 13.2 server and everybody that is using it has VM installed. I'd like to view slime chunks but am having an issue when entering the seed. Every time I press a key I get double characters in the window. The seed is 106012 (I think - working from memory here), but typing it in without hitting backspace results in 110066001122. So I delete the extra characters and hit enter and the entry returns to "seed unknown" and the slime chunk option remains grey.
It is doing this on my system and at least one other players system. Any idea what is causing this?