I just built a jumper 266 and it seems to fly well until I punch the throttle. Looking for a place to start debug, I thought I'd ask a question: Can PID tuning cause the quad to fall to ground when applying aggressive throttle?
Thanks in advance

I don't think PID can cause you quad fall out of sky

My guess is more toward FC/esc/RX shut down related to power... Do you have Blackbox onboard to see what went wrong?

Check all cables are not loose, and no cold solder joints

I think it is power too, not convinced those 500mA 5V regulators on the PDBs are that great, I just ordered some 1A 5V to try. I'm seeing some strange things, like being able to go through the ESC calibration when connected via USB and CleanFlight, but not when using Transmitter. I have some homework to do, I'll get back with results and black box data. Thanks for responding.