Chain not sliding inside the gauge but riding on the top of nose sprocket teeth.

[Coralillo Lo Pro]

Wow that’s strange, they look like their quality control has gone to hell.

 

[J D]

Yeah, thats not right. Be interesting to put a caliper or micrometer on it & compare the thicknes of the drive rim to another 050 one... or measure the gap with feeler gauges & compare. If there's enough play the drive links can bind between the nose & the spur they're supposed to ride around on. Usually this only happens whe the nose sprockets are very worn or the nose has splayed apart