Vulkan_pso_cache.bin - what is it, how do we version it?

We've been banging our heads against our desks for the last week or two, trying to figure out why our Vulkan builds on Android have glitches that seem random. We'll observe a glitch in a build (missing meshes, random black flickering, etc.) and then make another build without changing settings, and things will work again. This morning we realized that deleting the app and doing a fresh install seemed to result in slightly different results.

Then we noticed that the game is saving a file called vulkan_pso_cache.bin. Deleting this file (or turning off Android's cloud sync feature that saves/restores files on google drive) seems to change the nature of the glitches we're seeing.
So my questions are:
- What is this file
- How does Unity decide when to replace/recreate it? For instance, if we change a material and make a new build, would that result in an updated cache?
- Is there a way to turn this off for development, or somehow control the versioning of it to force updates for existing installations?