Conjecture on the unblown extended period map for I-surfaces

Let $\mathcal{M}$ be the moduli space of I-surfaces, let $\widetilde{\mathcal{M}}$ be the natural blowup of the moduli space along the boundary, let $\Phi\colon\mathcal{M}\to\Gamma\backslash D$ be the period map, and let $\overline{Z}$ be the partial compactification in the extended period map conjecture. Let $\mathcal{S}_{1,1,1}$ be the elliptic ruled stratum with multiplicities $(1,1,1)$. Unblown extended period map conjecture. In addition to the extended period map conjecture, (iii) $\Phi$ extends to a holomorphic map

$$\widetilde{\Phi}\colon\widetilde{\mathcal{M}}\to\overline{Z},$$

so no additional blowups are necessary; (iv) $\overline{Z}$ is an orbifold near $\widetilde{\Phi}(\mathcal{S}_{1,1,1})$, and $\overline{Z}-Z$ is there an orbifold normal-crossings divisor locally consisting of three orbifold smooth divisors; and (v) the normal derivative of $\widetilde{\Phi}$ to $\mathcal{S}_{1,1,1}$ is injective at a general smooth point, hence its derivative is injective at a general point of $\mathcal{S}_{1,1,1}$. This strengthens the preceding conjecture by asserting that the natural blowup already suffices and by describing the local boundary and generic infinitesimal behavior near the distinguished codimension-$3$ stratum; the source does not state whether it has been proved or disproved.