The Table.Style.Borders are rendered around the item, and if there is a page break in between the rows this is not an end of the item but an end of the page.
Please test using background image in the section or the borders of the surroundings sections to achieve the desired layout.
Feel free to open a support ticket and send us a demo project, with report and test data, to check your settings and the options to style the document as requested.
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