This now appears to be fixed.
One of the latest hotfixes on live servers affects Rune of Unleashed Fire which seems to have been done incorrectly. This ability now pulls every mob without about a 45 yard range of the player, whether you are in combat with that mob or not. If you value your sanity in keys, you should probably unequip this immediately, or else your keys will almost certainly be bricked.
If you were doing any kind of Mythic+ keystone while this hotfix happened, you would immediately notice that something pulled everything. This happened across almost every stream, Discord channel and guild which was an interesting event for everyone to try to figure out at the same time.
