Vulkan Shaders processing endlessly

Sometimes, when steam is fossilizing the shaders, the process runs endlessly. Here is an example log file from shader_log.txt:

[2025-03-11 07:46:59] Starting processing job for app 2683150!
[2025-03-11 07:46:59] Setting MESA_GLSL_CACHE_DIR=/media/zhujik/0B260D570B260D57/Spiele/Steam/SteamApps/shadercache/2683150 MESA_DISK_CACHE_READ_ONLY_FOZ_DBS=steam_cache,steam_precompiled,steam_precompiled_904f69d2b1b44b65,steam_precompil
ed_6c3f2d6fd9f36627
[2025-03-11 07:46:59] Starting replay of FOZ databases for AppID 2683150 with /home/zhujik/.steam/debian-installation/ubuntu12_32/../ubuntu12_64/fossilize_replay in:
[2025-03-11 07:46:59]   /media/zhujik/0B260D570B260D57/Spiele/Steam/SteamApps/shadercache/2683150/fozpipelinesv6/steamapprun_pipeline_cache.904f69d2b1b44b65/steam_pipeline_cache.foz.
[2025-03-11 07:46:59] Still replaying 2683150 (0%, 0/33841).
[2025-03-11 07:47:09] Still replaying 2683150 (6%, 2257/35529).
[2025-03-11 07:47:19] Still replaying 2683150 (35%, 12552/35832).
[2025-03-11 07:47:29] Still replaying 2683150 (52%, 19253/36441).
[2025-03-11 07:47:39] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:47:49] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:00] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:10] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:20] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:30] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:40] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:48:50] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:00] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:10] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:20] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:30] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:40] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:49:50] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:00] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:11] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:21] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:31] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:41] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:50:51] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:01] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:11] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:21] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:31] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:41] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:51:51] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:52:01] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:52:11] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:52:21] Still replaying 2683150 (73%, 26975/36488).
[2025-03-11 07:52:31] Still replaying 2683150 (73%, 26975/36488).

When i skip or cancel in steam window, steam becomes unresponsive, i can force quit steam after a while and restart it, then recompilation will succeed. however, something in the background is still processing, because the system cannot be shut down properly afterwards (it freezes on suspend / shutdown).

I suspect some kind of resource exhaustion, however, I cannot find anything when investigating (CPU, Mem, Disk are not exhausted). Please advice

Start with the shader_log.txt reproduction and the fossilize_replay invocation shown in the report, focusing on the replay stopping at 73% and the effects of cancelling it. Investigate the replay and cancellation behavior using the reported AppID and shader-cache path. Done means shader processing completes or cancels cleanly without leaving background work that prevents shutdown.