In “Maps” on your controller, you can see last know GPS coordinates which might help you find it. GoProhad me upload my flight info to their website & determined flyaway was magnetic interference...I personally had wonderful help from customer service & the’re replacing my Karma, GoPro, etc. I called and waited on hold for less than 5 minutes for help.
I bought my original Karma kit used on eBay for under 450 bucks. After a few flights the controller crashed and locked up! I rushed to replace the controller on eBay for under 60 dollars but my Capricorn kicked in wanting to fix what I had. I called Tech Support and got a lady with a heavy accent and who talked a million miles an hour I couldn't understand. Frustrated I ended up hanging up on her. The next day I got on the chat help line... The dude asked for a screen shot of my receipt for my eBay purchase of a second hand drone and WHAM!!!! In an instant informed me they were going to warranty the controller, sent a return shipping receipt for FedEx and next thing you know I had a brand new controller for free. I loved my GoPro tech support CHAT help!!!