Can confirm this.
Crashed scout mission. I closed up to the ship, saw 1 last sebilian inside main hold. He saw my troops, opened doors to reactor compartment and escaped inside. I carefully go after him, best people, stun grenades, wait turn for smoke to dissipate. Few steps to reactor and only to discover empty room and plasma shot trough the wall while not being able to shoot back, because this annoying alien somehow can walk where he shouldn't to. Only on next turn my troops discovered where he was, he wasn't visible before.
Screen - https://docs.google.com/file/d/0B0cKXPpo9NNxbUFLOU9vYWF6MU0/edit?usp=sharing
Save - https://docs.google.com/file/d/0B0cKXPpo9NNxT2EzUVBzSk11bEk/edit?usp=sharing