Well after 5kg of light to medium beans I have finally found a bean that stalls my Niche zero, multiple times over 20g. It’s a light roast geisha from django. Normally turning it off and on gets it moving but a few times I’ve had to turn it upside down and use something to dislodge the jammed bean.
However contrary to advice I’ve seen removing the anti popcorn disk actually helped. It allowed the beans to jump out more with less beans at any point in the burrs and it runs smoothly now.
I’ll replace the disk after this batch of beans is used up.
Mainly here for anyone searching for help on similar issue.