I'm having problems with the voiceover sounds in this game.

When a character tries to say something, particularly during the training levels or when giving orders, their dialogue either gets cut off immediately or doesn't play at all. I think some sound effects get cut off as well but I'm not sure.

This problem doesn't happen all the time but it occurs more often than not. This doesn't happen during cutscenes as far as I know.

Any help on this problem would be greatly appreciated.