I've been playing hours of Fallout London now and only just realizing there is in fact supposed to be voice acting and not just me reading subtitles! It seems only some of my audio is working, like rain and gunshots, but no voices or music. Any ideas how to fix this / what could be causing it?

I play through Heroic's GOG launcher using GE Proton.

System info:

CPU: 16x AMD Ryzen 7 7735HS with Radeon Graphics
Memory: 32.85 GB (used: 7.65 GB)
GPUs:
  GPU 0:
    Name: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt [Radeon 680M]
    IDs: D=1681 V=1002 SD=1513 SV=1043
    Driver: amdgpu
  GPU 1:
    Name: Advanced Micro Devices, Inc. [AMD/ATI] Navi 33 [Radeon RX 7600/7600 XT/7600M XT/7600S/7700S / PRO W7600]
    IDs: D=7480 V=1002 SD=1513 SV=1043
    Driver: amdgpu
OS: Linux Mint 22.3 (Zena) (linux)

The current system is not a Steam Deck
We are running inside a Flatpak container
We are not running from an AppImage

Software Versions:
  Heroic: 2.22.0 Hajrudin
  Legendary: 0.20.43 Riding Shotgun (Heroic)
  gogdl: 1.2.1
  comet: comet 0.2.0
  Nile: 1.1.2 Will A. Zeppeli

Edit: Switching to GE Proton 10-34 worked.