INAV, ELRS, OpenTX, OpenIPC fixed wing near-loss

It looked like a stall, but after reviewing the video OSD and the elrs logs, things got even more complicated.
Seems that suddenly my TX applied Full elevator Down, Full ailerons Left, (or stick up-left) for about 9 seconds.
I'm sure I didn't do this. When I saw this I thought some mechanical failure happened, servo died, or a hatch had detached... and I pressed RTH.
Yes, all experts advise against this, but this indeed saved the plane.
Okay, it may have been a loose connector in the hall sensor, probably ground, since both channels went to max values.
But, I had applied elevator up-trim to make the plane fly slightly nose up, so it was impossible to reach min elevator value with the stick, even if I short the wires of the sensor....
So can this be an ELRS(3.4.1), INAV (7.1) or OpenTX issue? The Tx is Jumper T-Lite.
ZOHD Alpha Strike
OpenIPC for the video link.

[@unixoid33]

that's why I don't fly over houses. our airplanes made of Chinese shit and buggy code can go crazy at any moment.

[@CosmicSlopVibrations]

Or people and roads

[@sesesp]

I have red about those tiny wires of the jumper gimbals coming loose and causing massive deflections. That´s why I replaced the cabling on my jumper t-pro with better wires. But as I understand you verified this could not have been the case?

[@tipoman9]

Good point, in the past I also replaced the connector of the throttle gimbal since it got stuck to the middle occasionally. It turned out that OpenTX saves in the log file the Tx gimbal values, before applying trim. So seems the issue is in the Tx. I'll open in and will try to reproduce the problem by twisting the wires, before replacing them...

[@unixoid33]

and if the antennas were circularly polarized, would the video be stable during these somersaults?

[@tipoman9]

yes, I was flying linear polarization antenna on the plane to test a longer range setup. Only the channel with the vertical polarization patch antenna had strong signal, as can be seen from the stats in the upper-left.

[@eggventlivestudio3283]

Maybe jamming gun ?

[@MaxR52]

really interesting footage. Are you going to try to fly it again?

[@tipoman9]

It seems the problem is not in the plane - it simply did what it was told by the control link. It might be the Transmitter (faulty connection in the gimbal), ELRS protocol glitch, or even INAV bug. Will investigate it further, but I'm unable to reproduce it still.

[@theball1]

Close call!