Wise's incoherence conjecture for free-by-free groups

Let $G=F_m\rtimes F_n$ be a semidirect product of free groups, where $m,n\geq 2$. A group is incoherent if it has a finitely generated subgroup that is not finitely presented. Wise's incoherence conjecture. The group $G$ is incoherent. This conjecture is motivated by the paper's results proving incoherence for broad classes of free-by-free groups, including groups satisfying the excessive-homology criterion; the general case remains open.