Trim pwm when function disabled


Earlier I used a firmware ArduPlane v3.8.5.
I decided to update the firmware to the latest (ArduPlane v.4.0.5) and I got a problem that when starting up autopilot on channels where the function is disabled, zero pmw come, not trim.
What I should to do that when the autopilot is starting up, trim values appeared in disabled channels?

Thank you for the attention.