Maybe I didn't explain.
So I was flying with both remotes-
Stock
With Cyclone
I flew with the Cyclone first and had a great solid flight.
When I switched and re-linked my stock remote (which sucks by the way having to sync every time I switch, unless I want to have primary and secondary), I shut off the controller, but accidentally left the antenna on next to me.
When I started the "stock" flight, my video feed was super laggy and choppy... I figured it was too hot out? I looked over and saw my controller there with the antenna hooked up and on. I reached over, shut it off, and the video stabilized and was fine afterwards.
So yes, it was on, and I do think it was causing interference from the Mavic to my controller and phone.
I did my longest flight afterwards and not more laggy video?