This is easily reproduceable by finding a spot a bit higher than a flat ground, make sure you aim at the ground to have the DIG FOR WORMS option,
higher ground might be in a gray outside shack where you stand on that thing in the doorway that makes you a bit higher than the floor, or on some external house doorsteps.

You intend to start digging, the character begins that animation, the circle starts spinning for a split second before stopping.

The character is now glued to the spot, unable to move (aka dragged back to that spot he stands on), UNTIL you look at the ground again, and COMPLETE the digging entirely, thus now it is possible,
the first attempt to dig is always failing in such instance.

Being frozen like this, makes you vunerable.

Yet you can always unfreeze by doing that second successful dig