Missile Defence bugged?

[Blasphemaster]

So I have just added Alex to the team and I've decided to have him be my Missile/Anti-Missile Specialist. However, I've had this bug up since I first started playing the game:

When I hover the mouse over the pilot missions panel I see : Current Mission: Not Found String: #UI_PM_MISSILEDEFENCE

This is the first time I'm using this pilot mission behavior and I haven't noticed a lot of difference in what is going on with Alex except that he isn't attacking, and there doesn't seem to be lot of difference in how many enemy missiles are getting through. So, I'm not sure if this is just a display error or there's an actual problem with the gameplay.

Either way, first post, love the game.