The "break-after" (and "break-before") attribute is only implemented for <fo:block> and not for <fo:table>. Most probably it isn't implemented for some of the other objects for which the "break-after" or "break-before" attributes is valid.
This relates to bug# 42600 though a different use case.
*** Bug 51068 has been marked as a duplicate of this bug. ***
resetting P2 open bugs to P3 pending further review
rtf is no longer actively maintained; if a patch is submitted, it will be considered for application
batch transition resolved+wontfix to closed+wontfix
batch transition resolved+wontfix to closed+wontfix; if you believe this remains a bug and can demonstrate it with appropriate input FO file and output PDF file (as applicable), then you may reopen