Which att p gains do you mean?
it is a zmr250 that flys with the naze just fine.
Today installed the latest qgroundcontrol and flashed the latest master.
it ist generic 250 racer.
Multicopter attitude control are like this
ptchrate-d 0.005, -i .2; max 500 -p 0.1
rollrate-d 0.005; -I 0.1; rollrate_max 500; rollrate_p 0.1
When I now try to lower the Pitch_p it tells me “Paramter write failed:comp:1 param:MC_PITCH_P”
When reconnecting, the changes are lost.