Operating system: Windows 7
Graphics card: Nvidia gtx 760 // Huion Kanvas pro 13
Broken: (example: 2.80, 8b2b79c2108b, master, 2019-06-06, as found on the splash screen)
Short description of error
When you Duplicate "Area into New window", and work in the graphic tablet, pressure sensitivity for strength / size / autosmooth, don't work.
Yes it works in original windows.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).