FPV Crash: Were we killed by RF interference ?

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As the title suggest, on the day we had a few weird occurrences, and later examination of our video makes us think that our 2.4Ghz control signal was messed with in some way.
Aside from these crashes, we also had krikey unable to roll his AXN on one flight with full ailerons, and then to work completely normally later. If the motorhome theory holds true, was the receiver simply to swamped to 'hear' us ?
Of course, it could have been something else - perhaps we're just rubbish at flying, but even we'd have to work really really hard to put 3 planes into a tight spin nose dive 3 times.
Any thoughts ?
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