I have noticed two specific bugs with the Evoker Season 2 Tier-Set bonus, which are happening in M+.
If I die during a bombardment (or if any other DoT effect is on any target currently, and release my body before either my DoTs have run out or the mobs are out of combat, when I respawn the DoTs can trigger Insurance, sending Shattering Stars across the whole dungeon and bringing me back into combat (looks especially funny in Floodgate as I can see it fly from the dungeon entrance up to the mob pack before the second boss, for exmaple). This means that a) I can’t mount up and have to run until the pack is dead, or b) if the rest of the group dies, and I am still in combat, the mobs will now either run towards me, pulling several packs of skipped mobs with them, or sometimes simply teleport to my current position if the distance is large enough, possibly wiping the group again.
The second bug is just as bad, as sometimes when Insurance procs and not enough targets I am in combat with are available, it’ll simply attack out of combat mobs that I am in range with for Shattering Star, randomly pulling groups of mobs we had planned to skip.
Not sure if the same bug happens on other classes as well, but it definitely happens on Devastation Evoker.