"Detonates nearby corpses" strongbox mod dealing more damage than usual

Hi GGG,

My lvl 78 Jugg just died to a single exploding mob from a strongbox with the "detonates nearby corpses" modifier. The map (tier 2) had no monster life modifiers/minus max res/less armor/curses, etc.
This really suprised me so I've been going around in standard rolling strongboxes with the same modifier in the same map type, evading map mods that change the monster type and sometimes even intentionally rolling mods that would increase the damage of an exploding corpse.

I have so far been unsuccessful in killing my character from "detonates nearby corpses" even when intentionally standing in as many exploding corpses as possible. I haven't even gone below half health. Whatever killed me I haven't been able to reproduce it.

I can only assume a bug at this point

pretty sure exploding corpses can crit, so that is prbly what happened.