Isn't this not the problem in CS where the bots angles overflow when they spawn? You should know all about that PM
edit: may aswell explain some:
If you are using botmans template, if the bots try to move more than 10 degrees (I think, maybe its 20) they stop and try to turn. If they're angles have overflown this might jumble up the bots interpretation and are not turning properly, meaning they will never turn the 10 degrees (or whatever) and will not move.
Use BotFixIdealAngles() function when a bot spawns.
.. or is It IdealYaw()...
Something like that... I don't use those functions anymore