Stencil not visible in projection painting mode for masks, V 11.1.0

Stencil not visible in projection painting in mask paint mode. Stencil is visible if projection painting on a material paint layer, however shows up as gray square if projection painting in a mask.

Steps to reproduce: 

1. Add mask to any layer.

2. Enter projection paint mode 

3. Add any texture/alpha/image to grayscale input.

4. Cannot see stencil in 3d viewport

This issue seems to only affect painting masks as all other channels seem to work correctly. Gray square shown below, but grayscale stencil for painting is applied. Painting on the actual stencil STILL WORKS CORRECTLY, its just you cannot see the stencil you are painting

Capture.PNG