[GAMEPLAY] Heimer Ult Bug

I don't know what would have caused the turret to stop attacking. It works regardless of me being alive or in range. Jax also didn't stun the turret as I died. Any ideas?

I have no idea how to reproduce this bug.

It does not happen frequently. It does occasionally happen though, mostly when I am dead. This is the first time I've gotten a video of it, because in the past I just looked at the situation as if someone debuffed my turret in a way for it to be null for the remainder of the time it was alive.

Edit: I reposted this just now because I didn't have [GAMEPLAY] in the title. I didn't read the "How to Report a Game Bug!" post beforehand.