PC – Voice Chat icons disappear when entering raid / tower

When I join a party, I can see the microphone and headphones icons for voice chat, and everything works fine. However, as soon as we enter Raid/Tower deffense, those icons disappear and are replaced only by Voice Meme. Other players in the party (who are on mobile) can still talk normally, but I lose the ability to use voice chat on PC.

This issue seems to happen only on the PC client (Windows, open beta). On mobile (iOS/Android) voice chat works correctly even in dungeons and Warband/Tower activities.

Device Type: PC
Device Operating System: Windows 11
Diablo Immortal App Version: 4.0.1.2991550