Hello @ranplayer, this issue is already being tracked at #6299. In particular to that issue report, if the size of the shader cache download is changing each time, then this is the current, expected behavior for Steam's shader pre-cache. Shader pre-cache updates (server-side) are independent from (local) video driver updates.
Closing in favor of the older issue report.
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
Some Proton game shaders keep being re-downloaded eventually (even without updates to kernel or graphic drivers). I've noticed this issue in titles such as Mortal Kombat 11 and Spyro Reignted Trilogy