Control servo with tabServo and joystick

HI everyone
I use heli-4.1.5 before, today I’m ready to update to 4.2.
But the servo controling troubles me.
I need to control servo7、servo9、servo10、servo11、servo12 with MP.
But after updating, I can only control servo7, both tabServo and joystick. sevo9,10,11,12 has no response
I guess it may be related to the new changes, such as servo_masks.
I want to know what i can do to achieve it?