It’s because of GoD. Waller and Illusionist are bad for GoD and so it appears to happen more with that build just because you notice it.
Also, back before NCS was nerfed, you noticed the bubble elites more because the pierces from NCS would strike them over and over again till infinity or until they die with each pierce dealing more and more damage so you could kill them really fast or if you were careful, drag them through the map killing everything that was in the bubble really fast.