Possible reasons:
1. The emergency stop button has been pressed, preventing the lawn mower from automatically returning to the docking station.
2. There are obstacles along the return-to-dock path.
3. There are obstacles near the charging station.
4. The lawn mower has lost its position.
We recommend trying the following:
1. Release the emergency stop status.
2. Clear any obstacles from the return-to-dock path.
3. Remove any obstructions covering, blocking, or surrounding the charging station.
4. Move the lawn mower back to the charging station to re-establish its position.