(Necro) mounting with barrier kills minions

Okay so I ran into this one yesterday when I unlocked the Jackal T2 mastery. Playing Necro with active minions, if I dismount the jackal and receive the barrirer from the mastery and re-mount before the barrier expires it kills all minions instantly. At first I didn't know how my Flesh Golem had died when I wasn't even in combat. It also killed my Rise! minions. I was able to reproduce this bug at will once I figured out what it was. Letting the barrier expire before re-mounting did not kill the minions.

Apologies if it's already been posted.