Are you using the Kahr modified mags and their mag release?
I had no issues with mine but swapped out the mag catch and modified it a bit so I could use surplus unmodified stick mags.
My drum never gave issue once I learned how to load it properly. I apparently wasn't putting the cartridges in correctly.
Been a long time since I shot it so I'll have to familiarize probably again. From the photo it looks like the mag might not be going up high enough.
But if your having issues with the drum, that might not be relevant.
I'm not much help here but I'll ponder some.
Maybe a photo of the stick mag out of the gun focused on the mag release cut out?
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."