PHPMaker v2026.6 with Preview extension enabled.
You may reproduce the issue from demo2026 project as follows:
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Open demo2026 project uses PHPMaker v2026,
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Click on Tools → Extensions → Type: Detail Preview → @phpmaker2026/preview, make sure you have already enabled it,
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After enabling it, click on Advanced tab → Tables → orderdetails, change 0 to 5 from PageSize column, then click OK to save the changes,
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Re-generate ALL the script files as usual
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Open the generated web application via browser, login by using username admin and password master
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Go to Orders table, and then click on the row which OrderID = 11077, and you will see the Detail Preview row is expanded, so far so good,
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Click on Next button/link in Paging area of that Detail Preview, so the URL will become: http://localhost/demo2026_original/orderdetailspreview?page=2
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Now here is the issue, you will see the content as follows:

