I was flying around and experienced a radio failsafe. RTL was engaged for one second and seemed like all motors were cut off while in RTL. Failsafe went away & stabilize kicked in very quickly, but my full throttle was not enough to recover - thankfully slowed it down enough to have no damage.
I have tested RTL and it performed (previously) without issue. I always manually RTL once before taking longer flights. I checked the throttle position for my radio failsafe - it is at zero. But this should not matter since in RTL throttle is not used (correct?).
I've been going through the logs but it does not make sense to me why would RTL set throttle to 0. Under CTUN, when graphing BarAlt + ThrIn + Thr out, at line 3104 ThrIn/out goes all the way down to 0 (when RTL kicked?). Shortly after on line 3126 you see full throttle, but BarALT continues to dip. Here is a zoom of the area:
Video of so you can hear motors cut out (I was trying new settings on my gimbal which is causing it to twitch in this video):
I checked if maybe my RTL ALT was set to zero, but it is not:
Any help would be greatly appreciated.. I'm afraid to do any real flying until I can figure out what happened. Log attached.