I sometimes experience the following problem on the official zeus servers:
When I switch to the loadout overview in the respawn menu it happens relatively often that the fps drop really low (~4fps). It seems that a large amount of loadouts is more likely to trigger this problem.
When this problem occurs the respawn timer also is slowed down.
Even after respawning the fps are very low and do not recover. Reconnecting is the only solution - but it is very likely that the same problem occurs again.
I think this problem started with Version 1.36 or 1.38. I never experienced this problem before at least.