Herelink -QGC | CUBE Orange| Px4 stack | Stabilized flight mode -Fixed wing V-Tail ruddervators not going to default positions


I have a configured my V-tail Fixed wing mini Talon on a CUBE Orange FC with Px4 stack using Herelink - QGC platform.
The concern is while in manual mode everything works pretty well. But when I change to Stabilized mode, the Ailerons are positioned in line with the control surfaces but the V-Tail ruddervators don’t go to default positions for a stabilized flight mode.
Can someone give some suggestions here . this may be a general troubleshoot procedure.