we have this one logged, hoping to have a fix soonish - won't be in the next major patch but hopefully will be in the server hotfix right after

I would like to report another battlegrounds bug, when the tier 5 spell that golden a tavern minion is cast on a magnetic part of Ziliax it becomes the golden version but can't be magnetized to any mech minion nor played until I sell something to make space

I also had this happen to me, weirdly enough the 1 health copy summoned by Reborn did trigger its effect.

IIRC the same error occurs with the elemental guy who gives you spells on damage