Custom component does not work on mobile

Hi all,
just created the very simple custom component. It does nothing - just shows the text with no any modifications.
Published, so it works well in preview and on mobile as PWA.
However, after publishing at Google Store, the app does not work.
Without the custom component it works well, after I’m adding and publishing new release, the app shows blank screen.
What would cause it?
I’ve never tried to publish apps with custom components and it’s my first experience. So any help would be appreciated.

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