Backflip mode not working?

[Jostinn]

Ok so this is going to sound stupid. But for the research I'm doing right now, I want to enable the backflip mode on the Go1 and do one as the dog does one. I'm coding the dog with Python and ROS but for simplicity, I'm asking about the legged SDK.

The mode command has a setting for backflip (9) but it says "reserve" next to it, so I assume it is locked by some condition. My code for calling the mode is as follows:

I can do other modes such as walk continuously with no problems, so I'm unsure as to why this doesn't work when I've seen videos of this model doing a backflip.

I appreciate all of your replies in advance!