Touching screen causes stutter with Vulkan

[krisvek]

Pixel 2, Android P, any recent build of Dolphin.

In GC and Wii emulation, it runs great, but whenever i touch the screen, it stutters. ONLY when I touch the screen.
If i leave it alone and just watch, it runs fine.

This behavior isn't present with OpenGL.

What can I do to help troubleshoot this? Thanks for any assistance!