Yesterday when starting Showcase: Infantry I noticed none of my teammates said anything. I still heard the “blip” when a radio message is supposed to start and the sound when a radio message is supposed to end but no one says anything under any circumstances. I still speak automatically in the beginning of Showcase: SCUBA and I can still say things using radio commands but no AI says any scripted messages like in Showcase: Infantry, artillery does not respond in Showcase: SCUBA and no one says anything simply.
I also can't hear any radio communication in the editor or when creating multiplayer servers and playing "Headhunters" with the AI.