Edit: ignore below, I'm an idiot and only just found the proper thread that explains this issue (https://forum.powerampapp.com/topic/15531-auto-resume-not-function-every-time-after-update-to-v3).
My apologies, but *bump*
This is the only problem/complaint I have with v3. Previously whenever I plugged in my headphones Poweramp would start playing immediately. Now it seems to be random whether it plays or not. Seems to be a 50/50 shot, but when it doesn't start playing it doesn't seem to matter if I re-insert the headphones. I have "Settings > Headset/Bluetooth > Resume On Wired Headset" enabled. Seems like pote found a solution, but I don't have the same menu options as him (I'm guessing he was looking in the settings of his phone rather than the settings of Poweramp).
I don't have the Battery Saver feature of Android enabled but I do have Adaptive Battery enabled. This issue seems to happen regardless of battery level.
I have a Pixel XL. Any suggestions would be very much appreciated.