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Probably the issue is with DPI rather than Windows or macOS.

you can often test dpr issues by zooming and refreshing. Different zoom levels give different devicePixelRatio values including many non-interger ones. At least in Firefox/Chrome

It is vibrating for me on Chrome on a Macbook Pro (Catalina)

Same here. The main splash vibrates on Windows.

I got a 500 on macbook and chrome.

just fyi, it seems to be working on firefox/chrome on linux/android

Seems strange to not test on windows at all