Stun Charm Not working

Was about to die to a bunch of normal enemies stun locking just by breathing on you for the 1000th time and paused quickly to see if I was out of charges on the Immune to Stun charm, I must be right? I shouldn't be getting stunned otherwise...

Still full, 80/80 charges... While actively being stunned

Skip to the ending- I died.

PS stun lock mechanics are lazy game design

Update from further testing:

First hit from the first pack on the next map with a fresh well infused charm- stunned, locked, dead.