In one of the farm maps there is a building type (a stable, I think) with large "windows" that are so large you can easily fit your Xenonaut soldiers through them, and seem to be designed with the intent that the player can vault through them. Unfortunately however, the player cannot, and it seems like a bug.
See Attached photo:
Steps to reproduce:
1) Load into battles until at a farm map with the building tiles seen in the photo (a stable?).
2) Notice that the building has VERY large windows and fairly low cover, enough that they seem intended for the player to vault through them.
3) Attempt to vault through these large "windows".
4) Notice that this does not work, and you feel sad and cheated.
Suggestions to fix:
Make those windows vault-able!