All Popups have the data-position-to="window" style. The body has style="overflow-x: scroll !important;". And the viewport is set to: meta name="viewport" content="width=device-width, initial-scale=1"

If the user did not scroll all Popups are nicely centred in the browser window. But after a horizontal scroll the Popups are no longer centred and are partial or completely invisible. They can only made visible after scrolling back.

Any suggestions how to fix this?