Tried it in several different planes with same results.
It's normal to stall with full back stick. It's not torque, you're exceeding your lift limit.
I understand about power on stalls. But this changed recently in how the planes are behaving for me. just noticed it doing it.
It's really strange. No buffet, just an abrupt drop of the left wing and wham I'm in a flat spin as fast as you can blink.
I re-calibrated the controls and checked all axis readings on the Controller Mapping pages and everything looks correct.
I have noticed though that no matter how many times I recalibrate there is always a drift up and to the left without the auto-pilot on. Kind of like the trim controls are screwed up in the code somewhere or something. But game plays and runs fine.
Might be a bad stick. Going to try and uninstall and reinstall the game and all drivers and see what that does.