Right now the LaTeX rendering of the Figure macro expects that the first XDOM element under the MacroBlock is a TableBlock when the figure macro contains a table. Starting with XWiki 10.10 the Figure macro has been modified to support inline editing and this was done by adding a MetaDataBlock element, failing the detection of a Table block...
In other words the following input:
was generating this correct LaTeX in XWiki < 10.10:
While it's generating the following in XWiki 10.10: