This spot kills me | Frog is still alive!

Hi Guys, this is another spot in Rome I like so much, went there to fly with a couple of friend and try the new M7 Gimball I get in tha mail today but I flew just one lipo cause unfortunately something goes wrong, I don't know if the fault it's on the motolab tempest or a bad solder join of the lipo cable on the Tempest fc, I'll check that for sure and hope to solve cause I can't fly that condition, plus it happen randomly..
Enjoy the video!!

Frog 5"
2206 2600kv
emax bullet 30a
5x4x3 dal
Motolab Tempest
Tattu 1550mah 75C
Runcam Swift2
Taranis QX7 (M7 Gimball)