vulkan-swapchain option on wayland buggy (causes blocks in mesa?)

Important Information

Provide following Information:

• mpv version version 0.34.0-365-g369168b9be
• Linux Distribution and Version 5.18.5-1-MANJARO
• Source of the mpv binary mpv-build
• Window Manager and version sway 1.8-dev-d726e506
• GPU driver and version amdgpu 22.0.0-1

Reproduction steps

--gpu-api=vulkan --vulkan-swap-mode=immediate --ao=pulse
or vulkan-swap-mode=fifo

Expected behavior

audio continues when mpv is backgrounded

Actual behavior

audio hangs

Log file

relevant output

[vo/gpu/vulkan/libplacebo] Requested swap mode unsupported by this device, falling back to VK_PRESENT_MODE_FIFO_KHR
AO: [pulse] 44100Hz stereo 2ch float
...
Audio device underrun detected.

Audio/Video desynchronisation detected! Possible reasons include too slow
hardware, temporary CPU spikes, broken drivers, and broken files. Audio
position will not match to the video (see A-V status field).

full-log

Start by reproducing the issue with --gpu-api=vulkan, --vulkan-swap-mode=immediate or fifo, and --ao=pulse while backgrounding mpv; review the linked full log and the reported Vulkan and PulseAudio messages. Done means audio continues when mpv is backgrounded without an underrun or audio/video desynchronisation.