Help for position hold settings

Hi again
I use the mhkabir firmware to address for pixhawk
In LPE mode, I have a pix4flow sensor and i do not use GPS.
I uploaded the pix4flow orginal firmware ، but unfortunately, when I go to a mode position hold ,
my Quadcopter becomes unstable and shaky and how many times my quadcopter crashed
Should I do certain settings for this mode?
Thanks if you help me

You’ll struggle to find help with the px4 stack here (this being the ArduPilot forum.): if you need to use px4, then perhaps asking your question on will get you some assistance. Alternately, load ArduCopter and reflash your px4flow with MissionPlanner, then have another try. We might be able to better help you then!