When you flip the stylus to eraser the first time in a session, and then switch back, the opacity of the brush is set to 0% STEPS TO REPRODUCE 1. Use a brush 2. Flip stylus to erase 3. Flip stylus back OBSERVED RESULT The brush opacity is now set to 0 EXPECTED RESULT Opacity should not change SOFTWARE/OS VERSIONS Windows: 10 64bit
The bug has been fixed by a5e32be9473fd50aa8a60baf3c5f0ecc0c6a3617