sometimes navigation modules does not correctly identify the position and height after startup
but after some "good" data it used as home position
every time I check using OSD distance to the home point and the height, in rare cases, by the time of the start of the height may be changed to +100 meters
I suggest functional expansion "arming motor procedure" or move saving of home position to first time when thottle stick going > 10%
This sounds sensible to me. I think it would also be a good safety feature to prevent accidental motor start until armed (similar to APM:Copter?) and to ensure a correct 'home' location for non-telemetry users.