I've noticed this as well, but I don't think it's the CC as I've been struggling to solve it in the stock Mage.cs. If I throw a debug message in the combat() function I don't see it being called even though current activity is combat according to honor buddy. I've tested this on both the 1.9.4.5 and 1.9.5. I never had this issue with earlier versions although then I was messing with my own priest CC. Once the US servers come back up I'll re-install this CC and see if I can't help out some or at least track down the issue in my modified Mage.cs (in between fixing bugs for my real job!).
Edit: Servers just came back up and I realize now the add list didn't contain poly-morphed mobs so the re-targeting while in combat was my fault due to a logic flaw on my end not HonorBuddy