break avoid with XSL Formatter

Hello,

In XSL-FO, the "page-break-inside" attribute with the "avoid" value allows to avoid a page break in the middle of a block.
However, when there's no place at the current page, instead of insert a page break before the block, XSL Formatter deletes all the carriage returns, flats the block in the vertical way, and overflows the page in the horizontal way.
It is the same behaviour for the "keep-together" attribute.

Since I don't want to insert page breaks systematically behind the blocks, does anyboy know how to bypass these behaviours ?