Hello. I just got my 15.6 pro. I installed the newest driver (as of nov 26th 2019). Calibrated and checked 'windows inl' box under tablet settings. When I open photoshop the pressure sensitivity and brush will work. But if I switch to a different window and come back to photoshop the pen will stop working. It wont pick up on the brush at all. And when I add a new layer it will randomly lose pressure sensitivity. I have uninstalled and re installed and restarted my computer three separate times and it continues to happen. This has been making the tablet unusable. Anyone else having this problem? Photoshop is the only drawing program I use. I have no other tablets or drivers installed.