I will decline this bug report as the issue is due to the Report being too wide ('25.7cm') to fit on a single physical page (A4, Portrait, with side margins '2cm', which makes the usable width '17cm').
Please, check the message when hovering over the warning triangle on the top-left corner of the report definition: "Report is too wide to horizontally fit on a single page".
You need to narrow the report to avoid the horizontal page break - see Physical Page section in Understanding Pagination article. Another option is to increase the physical page width.
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