How come every time I fly I have to set my programmable buttons? They don't stay set. Does anyone else have this problem?

I have noticed this also. Only when connecting my phone via OTG. If I connect my phone to the RC via WIFI the buttons will remain configured

It's a bug with OTG but obviously OTG is non official method of connection I doubt DJI would address it.

Ok thanks. I haven't tried to fly with just wifi and my rc yet.

My settings keep after a flight and power cycle, no OTG cable though.

not sure if this helps... if you program the keys but you didn't fly the spark (meaning just switch on remote n spark only), things wont be "saved".. have to at lease launch for the settings to be "saved" could be a bug