Vulkan renderer prevents taking Steam screenshots while in-home streaming with Steam

Playing PoE with Vulkan and Steam overlay enabled: F12=Steam screenshot, without problems.

When streaming from the same PC with the same settings to another PC, F12 does nothing (no Steam overlay screenshot popup, no screenshot) on both the host and the client PC.

Switching to DirectX immediately alleviates the problem.

Some details:
- Steam overlay is enabled on both PC's
- F12 is bound to Steam screenshot on both PC's
- Both PC's run Windows 10
- Both PC's are on the same LAN