Strange behavior if using reversed function in RC calibration

If I use the reverse function in the RC calibration screen, I got servo directions which are sometimes Ok, next time they move in the wrong direction.
I think this is critical.
I reversed the channels in the RC without using reversing function in MP RC calibration and now all is fine.
Anyone else has this problem. I spend hours of setting up servos, with strange results.

what MP version are you using?

I used the latest version 1.3.58. But I am not sure If I had enabled Beta updates.