Görtz's flatness conjecture for ramified symplectic local models

Let $F/F_0$ be totally ramified, and let ${\mathcal L}$ be a self-dual periodic ${\mathcal O}_F$-lattice chain. Let $M^{\mathrm{naive}}_{G,\{\mu\},{\mathcal L}}$ denote the corresponding naive local model.

Görtz's flatness conjecture. For any self-dual periodic ${\mathcal O}_F$-lattice chain ${\mathcal L}$, $M^{\mathrm{naive}}_{G,\{\mu\},{\mathcal L}}$ is flat over

$$\operatorname{Spec}{\mathcal O}_{F_0}.$$

Topological flatness is known in the stated setting, and the naive, vertexwise, and local models agree topologically. The conjecture concerns equality of the schemes themselves and remains open in the supplied source.