When Druid is in the Bear or Cat form, bot is trying to Regen (drink or just wait) till full energy or rage bar, counting it as a mana. So druid in bear form is just stuck forever, because he can't regen rage to 100% out of combat.
In cat form, he will just wait till full energy, log file will say "Regen started".
In both cases, if he got any water left, he will use it after each combat even with 100% mana. Doing that, he will lose all water very fast and then will just stand forever in bear form.
This bug makes druids completley broken for WotLK. And it never happened in Vanilla or BC.
Here are some posts with the same problem: