[V21e4 GC Base siege] Stuck in Hidden Movement screen and Some weird behaviours

[Trance]

My main base got sieged by a Caesan Carrier in details this what happened in my all 3 playthrough:

-1st try-

1)1st wave of Aliens started to teleporting left and right, started shooting things in my facilities

2)In my first tun i moved out my boys in order to scout, no sign of aliens

3)2nd Alien turn, i saw some Teleporting Alien getting close, some of my men got engaged

4)Realizing i scattered my men too much, i order the retreat in the HQRoom, i kill a Leader on my way back

5)Alien troops storm my Workshop where 2 of my men are defending it, 1 got killed by some random shots that went through the eastern wall the other just got some injuries

6)"Wall shots again ? , damn son imma reload"

-2nd try-

i Scatter all my men just outside the HQRoom leaning all the corners

1)1st Alien turn they do the same thing, teleport here and there, shoot things

2)my 1st turn i just order my men to sit and wait in their corners

3)2nd Alien turn its when i got stuck in the Hidden Movement screen

4) Well, S***

-3rd try-

Same setup, same doing, same thing, got stuck in the 3rd turn

What happened so far:

1)Aliens eagerly teleporting left and right

2)Shoot down my furnitures and facilities

3)Shooting through walls (Ain't kidding, it happened in the Workshop from the room at the extreme east from it)

4)Hidden Movement screen freeze

savefile:

https://mega.co.nz/#!5QpnzL7a