I’m working with a Grid Subdivision of 10. Glyphs often snaps to the grid points and sometimes the node just can’t be dragged short distances.
I think that glyphs may have a problem keeping track of the Grid Subdivision value. I just changed the value from 10 to 1, then back to 10, saved, and restarted Glyphs. After opening the file I found that the value was 1. It took three attempts at opening info, changing the value, closing info, and then opening it again to get the value to stay at 10.