Vulkan crashing issue, want to understand why my workaround fixes it and what else can be done.

Whenever I start a game with Vulkan, it will crash and close. I've found a workaround and am hoping for a better fix. If I start the game with OpenGL, then exit with F5 and change settings to use Vulkan, it works until program exit. Vulkan obviously works, just not the first time I try it.

Why does this happen? It happens on both my PCs, and this same fix makes it work. Maybe finding a log would help explain it but all I can find are crash dumps that don't help me.

I've tried deleting cache, changing settings, and it's a persistent problem with any game.

Edit - It was FPSMon. I have it hidden by default but active in the background so I could toggle it to see FPS info any time. Closing it fixed the crashes.