I used a rocket launcher then wanted to use a pistol, after i equiped it i clicked return to battlefield and it crashed.
Another bug/suggestion is when in ground combat my soldier couldnt shoot an alien because of a tank was occupying the 4 squares near it but my soldier could still see the alien because of the way the tank was facing (diagonally) its hard to explain without a screen shot and its a rare occurence but i hope you understand me.