12 hours ago, eslader said:

I've had this happen before and it's usually coincidental to running weather settings that update at a set frequency rather than "live." If you're at cruise speed with an 80kt headwind and suddenly the weather changes so you have a significant tail wind, you will fall out of the sky until you've built enough airspeed to compensate.

I'll chek next time, ty.

Mauro

Edited November 20, 20241 yr by zetato

Update,

I think I found the culprit... It's myself, or better, I discovered that my old Saitek control wheel whom I removed the springs years ago and replaced with elastics,  has a little stop at around 1 cm forward the zero. Today I noticed i pushed inavertitedly a little with my knee, and it stayed in that position, forcing the aircraft to push the nose alittle down. tha AP tryied to correct in some ways, but it was a contiuous losing altitude to then regain it but always a little less. When i pulled the wheel to the correct zero, all worked well again.

Sorry for this mistake, and thanks to all that tryied to help me.

Have all a nice Christmas

Mauro