Q-polynomial quotient conjecture for taut distance-regular graphs

Let $\Gamma$ be a taut distance-regular graph with odd diameter $D\geq 5$. By the source's stated theorem, $\Gamma$ is an antipodal $2$-cover; hence its antipodal quotient is defined. Q-polynomial quotient conjecture. The antipodal quotient of $\Gamma$ is $Q$-polynomial. This proposes a structural property for the antipodal quotients of taut distance-regular graphs of odd diameter at least $5$; the source gives no resolution.