I’m guessing it has something to do with adaptToDeviceRatio.
Maybe you’re using the canvas resolution directly as the canvas css size, and the device resolution is actually larger than the css resolution.
Actually, you can reproduce this problem on pc, ctrl + wheel to zoom in, and start the game
For a simple fix, add max-width: 100dvw; to the canvas.
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You’re right @qq2315137135, that did fix it. 
Many thanks. This issue has been depleting my HP for hours.
Hey @qq2315137135, what tool did you use to investigate? I’m referring to the image above before the video.
In Chrome it is, three dots button → More Tools → Layers.
In Edge it’s simpler, click on the plus sign → 3d View
Chrome
Edge
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Thanks @qq2315137135, I appreciate your help.
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