Oh dear, it's all gone wrong again

Yuneec now say they have tested the camera and are unable to replicate the issue ! I have sent them some more original footage and investigations continue. But I have had another thought, which might be worth running past you guys, just on the off-chance I am on to something...
As you know, the problem I am getting is weird regular dimming flashes roughly every 1 second any time I try and film in 4K.
Well, today I was testing my
Loc8tor, the tracking device I have been using on the H so I can find it if it ever crashes. As I tested the unit today I couldn't help noticing that the tracker itself was flashing and pulsing roughly every 1 second. And then I remembered where that tracker was mounted on the H - right above the camera, indeed just under the release catch you'd use to take the camera off the unit. The web site for Loc8tor says only that the tracker uses 2.45 GHz, but I wondered if there could be any correlation between the pulses that tracker is sending out, and the dimming phenomenon I am getting in the footage. I have very little information or evidence with which to confirm or refute this unfortunately - of course the simplest test would be to do a flight without the tracker, but of course Yuneec have my camera at the moment, so I can't do that. I don't even know if the tracker unit continues to output the signal pulses even when the hand-held unit isn't activating / searching for it.
If anybody knows about these things please may I have your opinion as to if you consider this a possible or likely cause of the problem. It would be equally valuable to know if it probably isn't the cause as well, though I can't think of anything else that would explain why I get the problem and Yuneec doesn't. A search of the internets for 'Loc8tor CGO3+' doesn't find anything related. Hmmm.
Thanks everyone / anyone !