Well that was exciting, testing out a few changes in the paddock. Flying in gps mode pretty happily, decide to try RTH/Failsafe toggle.
Light starts flashing yellow quickly, hovers and slowly lowers itself then shoots straight up in the air :/ after a split second turning off failsafe and realising i cant get control back, smash it into manual mode where i manage to wrestle the beast back down to a surprisingly soft landing. Noticed that it also does this when i hit failsafe in atti mode..
Interesting to say the least