The Settings-Reset phenomenon was solved for me by keeping a fully charged battery for 2 days in the camera.
Settings are safe now, even when i take the (nearly empty) battery out, wait until it is fully reloaded in the fujifilm charger, an put it then back, without having a loaded spare battery in the x-pro2 in the meantime.
Thanks, Marc G.
I am glad, that i was all about it!