I always run singularities, that much I can confirm.
I have noted that--I think-- the game freezes when my Assassin Werewolf with Yin/Yang has launched an attack., but before the hit/damage is calculated.
AND-- I had thought that only the Cyborg dungeon froze with the "enemies staring at each other" --but LoL XV crashes the same way.



-- so Snow Shield, Sleep shield, Magma Shield, Disruption shield, etc.. but not Damage blockers. It's not that descriptions are "wrong" much of the time, they are just not very explanatory overall and act upon, or require specific circumstances.