- Start browser with window size 1x1
- In client A, emulate device metrics to be 500x800
- In client B query layout metrics, comes 500x800
- In client B, invoke Page.captureScreenshot
- In client B query layout metrics, comes 1x1

The issue is that client B was not aware of the emulation set up by client A and upon restoring emulation post-capture, it resets it to 1x1.