Foxhole (505460)

Every time I try to either join the war (after I pick a faction) or browse the servers, the game crashes. However, if I add PROTON_LOG=1 %command% to the launch options, it stops crashing and starts loading indefinitely instead. If I run proton directly (/tmp/proton_run), it doesn't crash nor load indefinitely, but returns an error asking to check for internet connection.

System info:

Computer Information:
    Manufacturer:  Unknown
    Model:  Unknown
    Form Factor: Desktop
    No Touch Input Detected
Processor Information:
    CPU Vendor:  AuthenticAMD
    CPU Brand:  AMD Ryzen 5 1600 Six-Core Processor            
    CPU Family:  0x17
    CPU Model:  0x1
    CPU Stepping:  0x1
    CPU Type:  0x0
    Speed:  3200 Mhz
    12 logical processors
    6 physical processors
    HyperThreading:  Supported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Supported
    SSE41:  Supported
    SSE42:  Supported
    AES:  Supported
    AVX:  Supported
    CMPXCHG16B:  Supported
    LAHF/SAHF:  Supported
    PrefetchW:  Unsupported
Operating System Version:
    Linux 4.x (64 bit)
    Kernel Name:  Linux
    Kernel Version:  4.18.4-arch1-1-ARCH
    X Server Vendor:  The X.Org Foundation
    X Server Release:  12001000
    X Window Manager:  LG3D
    Steam Runtime Version:  <Runtime disabled>
Video Card:
    Driver:  X.Org Radeon RX 550 Series (POLARIS12, DRM 3.26.0, 4.18.4-arch1-1-ARCH, LLVM 6.0.1)
    Driver Version:  3.1 Mesa 18.1.7
    OpenGL Version: 3.1
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x699f
    Revision Not Detected
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1600 x 900
    Desktop Resolution: 1600 x 900
    Primary Display Size: 17.44" x 9.80" (20.00" diag)
                          44.3cm x 24.9cm (50.8cm diag)
    Primary VRAM: 2048 MB
Sound card:
    Audio device: ATI R6xx HDMI
Memory:
    RAM:  7973 Mb
Miscellaneous:
    UI Language:  English
    LANG:  en_US.UTF-8
    Total Hard Disk Space Available:  233237 Mb
    Largest Free Hard Disk Block:  111907 Mb
    VR Headset: None detected

Start by reproducing Foxhole's join-war and server-browsing flows under Proton using the listed system details and launch options. Compare normal launching, PROTON_LOG=1 %command%, and /tmp/proton_run, then collect the relevant Proton or game logs; done requires identifying a reproducible Proton-side cause rather than only documenting the crash.