The ghost hands are looking in to the training area.

But a disc will push the player backwards.

If you are training to do the move without the ghost, then 3 discs in a row pushes you out of the dirt onto metal/wood.

At this point the moves stop working.

As disc is an early move a new person doesn't know why their moves stop working and they think its a pose issue when its not being ground and on dirt issue.

Solution:

Rotate ghost hands 180 degrees so your back is towards the middle of the dirt.

Or else redesign the area so that you can't go up and out unintentionally.