Broken aura gem after levelling up (Toggle aura no longer works)

Bug Report ID: #2653705002

I ran into a weird issue where my Wrath skill gem stopped working after levelling up (ascension / mana reservation nodes could also have been the trigger). If the aura is turned off, I can't turn it on. If it's on, I can't turn it off.

Trying to toggle the gem I notice an CPU spike but the gem does not change states.
I have tried un-equipping and re-equipping it. In different gem slots. Also unlinked ones.

Wrath current level 5 (was also broken on level 4):
Requirements: Level 36, 83 int
Character: Level 36, 154 int

I bought a new Wrath support gem (level 4).
That works. If I swap my Wrath gems while the level 4 aura is active, Wrath (level 5) stays active, but then I can't turn it off anymore.

I looked into all things that could prevent the gem from activating, but I'm pretty convinced something broke/corrupted this specific gem.

It's not the item it's socketed in (tried every slot, without other gems in the slot))
It's not the level of the gem
It's not the requirements (int)
It's not lack of mana (turned off all other aura's)
It's not the mana cost (37.88% requirement on 100% full mana)
It's not fixed with increasing the gem level (it was broken on level 4, also when it levelled to level 5)
My other aura's / heralds work fine

I could try vendoring it with a scouring / regret. But it seems better to keep it for bug analysis.

I'll keep the character (BeneniM) in the current state with the broken gem in a solo helmet socket; and practice on a new char. First time I ever corrupted something without a vaal orb ;-).

Forgot to mention that restarting the game / changing servers / zones also does not fix the issue.