AMD setup issue (steam)?

I got a RX 7600 XT installed and running. I'm having problems with Steam or any vulkan program, specifically. (Stardew valley, minecraft are fine.)

inxi -b output: https://pastebin.com/eH3WhAvK

lspci -k: 09:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 33 [Radeon RX 7700S/7600/7600S/7600M XT/PRO W7600] (rev c0)
Subsystem: Tul Corporation / PowerColor Device 2430
Kernel driver in use: amdgpu
Kernel modules: amdgpu

vkcube and /usr/bin/32/vkcube work fine (Selected GPU 0: AMD Radeon Graphics (RADV NAVI33), type: DiscreteGpu)

X11 log: https://pastebin.com/d8ycx10m

Steam is Alien Bob's package.

Here's a log from a game using proton: https://pastebin.com/s4ufEdZx

I note:
Code:MESA-LOADER: failed to open radeonsi: /usr/lib/pressure-vessel/overrides/lib/i386-linux-gnu/dri/radeonsi_dri.so: wrong ELF class: ELFCLASS32 (searchpaths /usr/lib/pressure-vessel/overrides/lib/x86_64-linux-gnu/dri:/usr/lib/pressure-vessel/overrides/lib/i386-linux-gnu/dri, suffix _dri)
failed to load driver: radeonsi
MESA-LOADER: failed to open radeonsi: /usr/lib/pressure-vessel/overrides/lib/i386-linux-gnu/dri/radeonsi_dri.so: wrong ELF class: ELFCLASS32 (searchpaths /usr/lib/pressure-vessel/overrides/lib/x86_64-linux-gnu/dri:/usr/lib/pressure-vessel/overrides/lib/i386-linux-gnu/dri, suffix _dri)
failed to load driver: radeonsiBut it shouldn't be using the radeonsi driver? (I've done steam --reset, too.)

I also created a completely new user, installed Brotato to it, and had the exact same issue. (So reasonably certain it's not just cruft.) I did a reinstall of mesa (slackpkg reinstall mesa) just to be safe.