I am finding that a particular sequence of actions in Glyphs (2.3.1,  on OS 10…10.5) results in the cursor being stuck as both a black arrow and a hand. Nothing that I have found will reset this, even after quitting Glyphs, except a Log out or a restart. Screenshot attached. In Glyphs and in other apps, the pointer cursor will change normally according to context, but it is always accompanied, one step behind, by the persistent hand, like an unwelcome hanger-on.
It is difficult to determine exactly what triggers this bug in Glyphs, because it is inconsistent, and once it has happened you have to log out/restart to get rid of it, so testing is laborious, but it seems (not surprisingly) to be some permutation or sequence of spacebar/command/option/click.
Of course it may depend on other things I have running, such as BetterTouchTool/Smart Scroll etc. It is certain however that Glyphs is an element in the mix. I can try to pin it down more tightly, but I am interested to know first whether anyone else has experienced it, and whether any obvious cause suggests itself?