I selected the top line (Cello), all 4 measures, then used alt+click to duplicate it into the bass staff, and it’s alignment and notation get messed up starting in measure 2. This passage also shows another potential glitch, where the blue bar numbers in galley view show up in the middle of the bottom staff line.
I’ll try it measure by measure this time and see if that works.
EDIT - Measure by measure also resulted in rhythmic corruption, but duplicating each triplet separately worked fine.
Also, if there is a better method for submitting bug reports, let me know!