PS CC2018 Crashes ...Please fix Bug.

In PS CC2018, when i assign a .5px feather to a vector mask in the properties panel, then click any layer, PS crashes. If I assign a .5px feather to a vector mask, then tab to the density input in the properties panel, I can touch any layer and PS will not crash. This has to be a bug that will upset a lot of people who don't save their work often! It is a critical fail.