Adding MCA and RadixCore to our mod pack makes all mobs (vanilla & modded) highly aggressive where they do the following:

• Able to see villagers from much farther away, gaining aggro when they shouldn't.

• Hit villagers through walls, windows.

• All mobs affected, not just vanilla.

Mod pack list for reference: https://pastebin.com/ncNc5S1V

Currently Bewitchment is disabled, but that doesn't seem to affect anything.
removing MCA seems to make mobs behavior go back to normal.