Hello everyone,
 
	Today I tried a derated climb profile to 37000ft, the issue I encountered was passing 30000ft, the plane stopped to climb and the A/T just rolled to idle out of the blue.
 
	I had to disconect the AP but was never able to disconnect the A/T, I did the following
 
	-Nose down
 
	-VNAV deselected
 
	-SPEED selected and manual selection of a speed
 
	After that the plane was holding 30000ft nicely so I decided to give the A/P another shot, it didn't go that great :
 
	I deselected the derated climb profile and reconnected the A/P what happen then was:
 
	-Trim rolling full backwards
 
	-Pitching Up over +4000ft/min (I saw that value fly by)
 
	I stopped the flight then.
 
	 
 
	Did that happened to anyone?