Flight mode "stabilized" limits elevator travel/range

Hello folks,

i have a V-Tail plane set up on a PX4. When using the “manual” flight mode, i have full elevator authority, but when i switch to “stabilized”, i can only move the elevator about half the way.

Am i missing out on something obvious? Already tried to play with the max/min PWM outputs, no progress there.

Thank you in advance!