bug: cam_trig_type and rc_function will set back to wrong values after open "gimbal setup"

i folks,
after while of testing and some help from chris jackson and philip rowse i figure out the problem, why my camera triger in pixhawk release 3.4.3 not work..

following steps i do :
change cam_trig_type from "relay to servo"

change on ( in my example ) rc12 _function from 1- pass through to 10 - camera trigger.
save and write params,
check trigger, everything works fine .

after that i open camera gimbal page,

don´t change any values, don enter in any fileds, just open, and leave the page.

after that, the values "cam_trig_type is set back to "relay"
and funkction on rc12 is set back to "disable"

trigger will not work.

in my opinion, that is a bug and should fixed..

thanks for doing that !

regards sascha

Start by reproducing the reported sequence in Mission Planner: set cam_trig_type and RC12_FUNCTION, save the parameters, then open and leave the camera gimbal page without editing fields. Trace the gimbal page's parameter-loading or save behavior and verify that the values remain unchanged after the page is opened.

Written by the indexing model from the issue text.