incorrect page layout (end of page missing?)

The new version of the reporting extension does not paginate reports correctly: it seems that the page break is not read, so the first element of a page is actually displayed as the last element of the previous page.

In my report, each page has an initial title line at the top and two lines of charts following it. In the previous version (labs), pages were created correctly: the first page with its title and graphs, the second page with its title and graphs, and so on. With version 5.2.0, the ‘title’ of the second page is displayed at the end of the first page, the title of the third page is displayed at the end of the second page, and so on.

Thank you in advance for your help and attention