Another new stable Steam-Client 07.10.2021 has been released for Linux. It contains an improved Vulkan-Shader-caching among other things:

Steam Client Update, October 7

A new Steam client has been released and will be automatically downloaded.

General

When Steam detects a game file has been corrupted, it will now try to reuse as much of the corrupted file as possible to save bandwidth when downloading correct data for that file
Fix bug causing slow reconnect to Steam after resuming from a system suspend

Remote Play

Automatically install the audio drivers on Windows when streaming starts if needed, pass -skipstreamingdrivers on the command line to disable them
Pipewire desktop capture available on Linux, launch Steam with the -pipewire command line option to enable
Fixed Linux games seeing multiple controllers when Steam controller configuration support is enabled
Fixed Linux clients not getting any controller input once streaming starts
Fixed using multiple PS5 controllers connected via the Steam Link app

Steam Cloud

Fix infinite retry loop for failed background file downloads
Increased the allowed upload time to enable transferring large save game files for users who have limited upload bandwidth

Linux

Reduced sizes of Vulkan pre-caching datasets by splitting and versioning them according to Proton versions and graphics driver capabilities. As a result, the datasets will start from scratch after updating.

macOS

Add OS support for macOS 12 “Monterey”
Fix browser user agent causing some web sites to misidentify Steam Overlay web browser