Mission rules wrote:
The Rebels mission tokens represent tunnels. A small figure can spend 1 movement point when it is on a tunnel to place its figure on an empty space containing a tunnel of the same color.
So while it's clear the tunnels get blocked if the other side is not empty, what about the side you are entering from.
If there is a figure on the space of the tunnel (on the side you start on) can you move through him and through the tunnel (that is empty on the other side)?
My guess is it should work but I'm not entirely sure here and would like support from the sages.