Pathfinder issues

Hello, I’m consistently (ever since the release of glyphs 3 and even in Glyphs 2) having issues with pathfinder in Glyphs. I cannot rely on its functionality because 90% of the time the paths just disappear or breaks in some other way, even if they are in the correct direction. So I end up doing those calculations in illustrator or some other tool. Can I ask if there is a plan to revise those tools? Thank you.

Can you send me some path that show the problem?

And which exact app version are you using? We had some fixes recently.