I've noticed that problem too and it seems to link with metamod; ceases to stop working after map change... for now you just have to create a new game with the map you choose instead of going through the console...

Our poor rb_maxbots starts to fill the server again as well... tsk tsk...

Edit:
Grenade usage might be nice...

Bots also seem to wander more than complete objectives... I wonder if this is do to the personality system or not...