Elevation lag and total ascent shortage

On punchy terrain, after a descent 1050 continues to descend when you're already going uphill
The same problem as I used to have with my 830 and 1040. But all Fenix and Epix works brilliantly.
The same problem has all my mates. Most of them ignore it.

I run SW 9.11 after master reset

here my ride from yesterday
Epix Pro https://connect.garmin.com/modern/activity/16770775492
Edge 1050 https://connect.garmin.com/modern/activity/16770805840