Weird behaviour when moving point with Nudge

Hi,

I’ve found strange thing when moving points using control + opt + shift. it adds/shift point after the fifth operation.

example:|

Moving from y = 693 to y = 743

instead of y = 743 it adds 1 point so y = 744

I am using Glyphsapp 3.2 (3223)

Does it happen with a newly opened file?
What is your grid?

Yes, it happen with newly opened file.

Grid Spacing 1, Subdivision 1.

and it add 1 point on 6th operation when doing it horizontally.