What's up with the monks in DE?

I can't find the patch note anywhere explaining why they move on their own the way they do. I always grouped them up with ranged units and put everyone in group on stand ground, but it doesn't effect monk units for whatever reason now. They just wander off and 99% of the time get themselves killed. It's insanely frustrating to have to deal with this and I wish they would fix this or at the very least, someone could make a MOD fixing this.