What the heck? Arris tumbled uncontrollably

[CC268]

So I was flying my Arris today line of sight (no goggles) and I was in Horizon mode. I was doing some flips and all of a sudden it flipped uncontrollably down to the ground. The drone was fine so I tried it again to see if it was an anomoly. And sure enough...if I try to do more than one flip it freaks out and flips uncontrolably down to the ground.

Any ideas as to why it is doing this? I got a brand new Bardwell F4 board in it, XR4-SB receiver.

 

[Wayno52]

I have had that before and it was a loose prop.

 

[CC268]

I have had that before and it was a loose prop.

I forgot to respond to this, but another fella over on Reddit mentioned having the motor idle set too low. Sure enough, that is exactly what it was. I had it set a 4.5% and bumped it up to 6.5% and it didn't do it again.