(Bug)? popup console error

here a screenshot in game current build today!
did made a report too!

http://images.akamai.steamusercontent.com/ugc/315619498563774523/C72D6A22003D31DA93024A41A9010C12262F8185/

Yea I got it too.and 4 other friends

Yep. Pops up after around 30 minutes of gametime and drops my frames from 100fps to around 30.

fixed!

Fixed? How? When?