I am getting the same issue and the troops are placed just as they are in the image posted previously.
There are no enemies around (even under the bridge so not sure what these are supposed to be shooting), no Mortars have been deployed. We have no troops left behind awaiting revival and no one will talk to me beyond the normal pointless replies.
There were a huge number of enemies getting here to the degree I though the mortars were to be used killing them but they would not deploy before hand.