Multiple Primefaces DataTables on one page have the same pagination index

Question

I have a PrimeFaces 6.2 DataTable with rowExpansions. Each rowExpansion has another DataTable with pagination enabled. The whole construct is within a single form. The backing bean is a ViewScoped ManagedBean. Selecting a row in a child table will update the parent table. The problem is now that when I change the pagination in a child table and select a row causing an update that the pagination in all other child tables gets the same index. So if for example I am on page while doing the change, all other tables will be on their page 2 as well. The same happens if change the pagination and open or reopen another rowExpansion. So, why on earth do these tables share the same pagination index? I have already tried to put all child tables in a separate form. This changes nothing.