I've been experiencing a really annoying bug in zombies. How the game normally uses longer bits of dialogue is that they are split into multiple parts depending on how long a character is talking examples being radios and the such. However, this bug triggers the second audio file to play early causing multiple character voice lines to overlap with each other making it kinda hard to hear them.
I have an example of this bug in action with one of the Maxis' audio logs in Origins.
(https://youtu.be/tizw4QhOosU)