So, here I was doodling away on a break from studying and decided to listen to music using my Beats Bluetooth headphones and then I realized.. Pressure sensitivity isn't working very well at all. I reset the iPad Pro, put music back on and tried to draw again.. Nothing. I switched the app to Apple's Notes app, still issues with sensitivity. I switched the tip on the pencil thinking maybe I busted it or something, same issue. I unpaired and repaired the pencil, same story. Turns out, by disconnecting my headphones or shutting them off, pressure sensitivity was back to normal. TLDR; Bluetooth headphones fudges Apple Pencil pressure sensitivity. Fix or angry.