Dinkleberg's GMod

I've had this problem a few times, I will join the game and press the scoreboard button and the scoreboard will still be on the screen.I still have every other function i can walk and play the game fully, but i don't like being stuck with it on my T round. Also i keep getting this same error what does it mean?
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It's a known bug right now. What we suggest is do not open the scoreboard as people are loading in before the 1st round. If this bug occurs, you're encouraged to rejoin the server.