Operating system: Windows 10
Graphics card: GTX 1060
Broken: 2.80 official release
Worked: on previous beta releases
Short description of error
While trying to draw or paint with the greaase pencil while using my wacom intuos pro tablet, the screen mapping is incorrect. So, for instance if I try and draw a circle the tablet does not represent a circle within blender. My tablet is working and the keep proportion settings within the wacom tablet settings are working correctly in other programs - photoshop, zbrush.
Exact steps for others to reproduce the error
Open blender start new 2D animation project. Select grease pencil to draw, try drawing a perfect circle in the active window. Hand movements do not correspond to input's translation into the workspace.