Ive been having similar problems with my fresh roasted (< 1 week) Brazilian yellow bourbon beans.
Things get clogged up and the burrs keep spinning but nothing comes out. A little Percussive maintenance and things move again for a short while.
I havent really had this problem before with other beans regardless of freshness.
I should probably try to let them age for a week and see if that helps, but I havent got around to roasting that far ahead of myself yet :)