Aggro Bugs in M+ Prot Paladin - Making Timing Keys Undoable

Over the last few days other people in party keep getting meleed on pulls even after I cast taunt, shield, divine toll, etc. and they cast nothing. I’ve checked logs and my abilities hit before anyone in party casts anything. It happens at least 3 or 4 times in a run, mobs will turn around and smack someone down even though I have aggro. Please fix immediately bc it’s making it impossible to finish timing my 13s!! (posting on alt bc my prot paladin just did a faction change and isn’t showing up in forum character select yet).

It seems to happen when I’m grouping 2 or more packs together. I’ll shield or taunt first mob/pack, drop conscecration, then move on to grab the next pack and the first mob/pack will turn around and smack someone down. Again, no one cast anything, and even if they did, my shield/taunt and consecrate should have enough aggro to keep them on me.