the red wire broke (with insulation and all) 6mm from white goo on the stick's roll-gimbal end. (potentiometer) - the others look good, but feel a bit hard.
I am not sure whatever this could be due to a manufacturing defect (insulation cut) or previous flying in very low temperatures. - no other wires seems cracked, yet all of those felt rather hard.
The flying speed was set to high, this happened at only 3 meters, I swithed to althold, (but increased speed due to higher authority in althold than poshold/loiter) - giving me the impression that something was very wrong. I tried to climb, it climbed unusually slowly - due to high horizontal speed, so I ditched it in some bushes - broke 4 props, no damage.
The logs were easy to analyze, full left roll (RC input went to "1000")
I had no time to understand what was going on in flight properly, but in retrospect, switching to RTL would bring it home just fine, and on landing, it would start to relocate at much slower speed, maybe, by yawing, a slow ditching on home-spot could be done.
In any case, taking a look at the wires could be wise, unless that controller had some unfortunate /brittle insulation or bad wire batch.