Ok guys I'm a believer now!

[glassdoctor]

As Shawn described it to me, what happens when the mamba's bec is overloaded is that it will shut off the bec to let it cool and then turn right back on, and it will do this 20x per second if neccesary.

So what you see is a radio glitch as you are getting, because the rx is losing power for a fraction of a second.

This would be very obvious if you run a Spektrum because they take about two seconds to power up if power is lost.