I had a very similar instance with my 2019. Mine was the result of me working the system pretty hard in manual, and then not following the reset procedure correctly. I had to hook up to the truck and retract all. I know you nearly couldn’t do that, but you can do it onto the ground too if there’s no obstacles. I found this out a few days when I hit the wrong button and walked away. Anyway, after the retract all, it was good. Also, I used the touch inside to reset instead of the phone. Not sure if it made a difference, but I find if my screen times out and go’s dark on my phone, the operation comes to a standstill.
2019 Eagle 321RSTS
2019 Chevy 3500HD SRW Dmax