  We give examples of hyperbolic groups which contain subgroups that are of
type $\mathscr{F}_{3}$ but not of type $\mathscr{F}_{4}$. These groups are
obtained by Dehn filling starting from a non-uniform lattice in ${\rm PO}(8,1)$
which was previously studied by Italiano, Martelli and Migliorini.
