Wacom pen eraser not erasing alpha when painting texutes

Hi guys, I used to be able to erase my textures by flipping my pen over and using the eraser end. It would essentially switch to the erase alpha blend mode. I just recently got back to blender, and this behavior is missing. The eraser is recognized in photoshop and krita. Everything else in blender works nicely with my tablet. I disabled Windows 10’s ink mumbo jumbo too.

Currently using Windows 10 and Blender 2.79.