I posted also to Github. @Serg
I guess you mean you posted this issue?
It seems several people are reporting similar level loading issues.
Did you play that specific level before before, or is it the first time you are trying to load it?
If you have played it before, the issue may be caused by slow-running simulation code that takes too long to finish. For some reason, it seems that a game simulation runs in the level loading screen and will not finish loading the level until the simulation has completed. Can someone confirm if this is the case?