I think it is not intended to work this way, reading the description of the action.
Dash
- Infantry that have not fired in the current turn may Dash two tiles (non-diagonal) at twice the normal movement cost.
- If the unit was not visible to the enemy before dashing, it will not be reacted to by other units on the first tile of movement.
- The unit may be reacted to normally by eligible units after the second tile of movement.
- The unit is considered to have moved fast after attempting a Dash.

