[Solved] AI players won't use bridge

[raypack]

So I made a few bridges to make the map less monotonous, but now the AI refuses to walk through them to attack their enemies. Instead they take the long way around.

Here is proof that the bridges work since my units easily pass through them:

Anyone knows how to fix it?
I can remove the bridges and just have normal terrain but it would be nice to have them since this bridge for example, the player can choose to destroy it with the explosive barrels to redirect the enemies' attacks against his allies onto him and then he can also repair it if he doesn't want to be attacked anymore by the Orange base.

EDIT: the units actually get blocked on the northern entrance. Why?


EDIT 2: Nvm... I fixed it. I just had to place more "ground" on the northern part of the bridges.