I’m just guessing here based on what I have happened to me. The axis moves and contacts the switch, then reverses a certain distance. If your setting is not moving enough in reverse to open the switch…you might end up with where you are. Does it go to alarm mode?
See settings $20 through $27 in the chart below.
GRBL_Settings_Pocket_Guide_Rev_B.pdf (diymachining.com)
To get to the settings:
How to change the GRBL settings on the V-Carve - Software - Inventables Community Forum