In case you haven't heard of this guy (msinger) on this forum - here is a link to his website
DJI Phantom Accessories & Tips - Phantom Help and information on how to recover, post etc. your flight logs etc. You can also upload your log to his site here
https://www.phantomhelp.com/LogViewer/Upload/
Guy is pretty amazing at getting answers as to issues similar to yours and even recovering lost Phantoms via reviewing data. You will also find info as to how to sync your flight record in the DJI Go App, set up for DJI Assistant and lots of other pertinent information on his site.
It is pretty obvious your issue is interference - however, why not get some other opinions and I can't think of any other who would be better at that than msinger --- Best of luck.............