I am using a surface pro laptop, this result exports as displayed in the viewport, it occurs with both my pen and my trackpad. The problem vanishes when the clipping mask is released.
Recap, When I draw with any brush (the mode is set to normal, at 100% opacity, settings check shape dynamics, texture, transfer, and smoothing) the brush stroke will act as an eraser AND erase the layer is clipped to. (which I find extremely odd)
I don't know why this is happening, any guesses, suggestions, or solutions?
Actions and scripting
Though the layer is set to hard light in this version, it was originally drawn on normal, the layer settings seem to have no effect on the outcome. What I've gathered is that the only color registered as a threshold for transparency/erasure is black. included the brush settings even though I listed them.