Tactical AI (and how it breaks).

[Monk]

Probably has the priorities too high in the "goals" system.

I believe this is indeed the case, yes. Priorities are likely far too high for cover, and the Ai is unsure of how to react when it finds some. Sometimes it ignores it altogether, which can be a good thing, other times it just huddles near it despite its objective (me) being far away.

Field battles tend to be much more cohesive.