Morita's conjecture on potentially good reduction of abelian varieties

Let $E$) be a number field, let $A/E$ be an abelian variety, and let $\mathrm{MT}(A)$ denote its Mumford–Tate group. A point of an algebraic group is unipotent if it is unipotent in a faithful linear representation. Morita's conjecture. If $\mathrm{MT}(A)$ contains no nontrivial unipotent $\mathbb{Q}$-rational point, then $A$ has potentially good reduction at every finite prime of $E$. This conjecture relates the unipotent radical of the Mumford–Tate group to the reduction of an abelian variety; the source gives no resolution status.