Logitech Crayon bad lag in photoshop, iPad Pro

YES. iOS is updated to latest version

YES. Crayon works in every other program with no lag

WHATS GOING ON: ONLY in Photoshop for iPad, when you draw with the crayon, you will not see the line or whatever it is you drew until you lift the stylus off the screen. you make a circle? you get nothing on screen until you lift the stylus off. Draw a line? nothing, until you lift the stylus off the screen. 

what if you use your finger? then it works like normal, seeing whatever it is you are making in real time. no lag, no delays. 

how do i fix this? I am subscribed to photoshop and it's un-usable in this state.