PLEASE CHECK THIS VIDEO OF THE BUG: https://youtu.be/sdLyEm3NNRM
Directions for Repro Mission: Run the mission on a dedicated server and join (mission is done quickly with only one player in mind). Use your radio menu (press 0, by default), and use 1 to make Ted Talk, 2 to make Bill talk, and 3 to make them attempt to talk at the same time, reproducing the bug.
Repro Mission: {F75304}