when boot up Photoshop, everything seems normal, until i click on a different app/window. Then the pen pressure are not working, and i don't really know how to get it to start working again. I just do something else on my computer and then checking back to Photoshop and then it suddenly work again. The pressure are also not working sometimes when i just switch to erase and back to brush. i have tried to restart everything but it's not working. It's a shame too, because other drawing programs that are not as good to me have the pressure working perfectly fine, but Photoshop is where i am most comfortable with.
I use intouos pro btw.
Could you please check if there is any update available for the tablet drivers?
Also, What is your operating system and version of Photoshop in use?
I'm using the latest driver, my operation system is Windows 10 version 1703 2017 and I'm using Photoshop cc 2017.