Ok, I am no pro with hexagon, but I know enough to be dangerous. I learned this trick from a geek at play tutorial. Hopefully it will help. If the surface you boolean cut becomes triangulated you can select the angles you want to get rid of and then hit backspace. You will get a pop-up asking if you want to dissolve vertices. Select “stray only” and it will delete the selected lines. It’s not perfect but it does help a lot. Used to have Hex crash a lot when I sent boolean cut objects to Studio, but it hasn’t happened once since I started using this.