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Lightbox off center when rotating screen on mobile

I have a page where I am do a test gallery with a mix of flex and grid. This has to do with the mobile layout.
Whe I pull up the page on mobile phone it looks good and the lightbox looks correct. If I rotate the mobile device and click another image to fire the lightbox, now the lightbox is off center. To correc the issue the page must be refreshed.

He is a live link. Please look at it on a mobile phone to see the issue.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Sorry here is a project link