Your issue is clearly related to the RC Pro FW and its settings, and not the drone. Exchanging the drone won't change anything, nor will exchanging the RC Pro hardware, since this is now a reproducible FW and settings issue on three different new...
hi captain~
I think Mavic 3 Pro is a good choice. But please be reminded that in terms of rain proof capacity, mavic 3 series is not that impressive as there are ventilation vents on the top of the body and rain easier get in and short circuit...
As someone who flys the Mavic 3 in the Rain , you cannot just put duct tape over the top vent as water will still find it way in.
This is why the Mavic 3 wet suits have a 3 Part System just for the top vent.
Duct Tape also leaves heavy...
I have a mavic 3 Pro that needs to get up about 10 Ft to catch the Home point , not sure why this is as my other drones catch home point on the ground off the same spot.
Phantomrain.org
Gear to fly your drone in the Rain, Land on the Water
I tell you what, everyone, it is still doing this even when not near buildings - it takes about 4 minutes of being 50ft up before it eventually fins the sats and gets it's home point?