The center conjecture for non-semisimple BMW algebras

Let $B_n(q,t)$ be the Birman–Murakami–Wenzl algebra over $\mathbb{C}$, and let $WL[x_1,\ldots,x_n]$ denote the commutative central subalgebra generated by the elements $x_1,\ldots,x_n$. Assume that $q\in\mathbb{C}$ is generic, $t=q^{2a}$, and $B_n(q,t)$ is non-semisimple.

Center conjecture. The center of $B_n(q,q^{2a})$ is

$$Z(B_n(q,q^{2a}))=WL[x_1,\ldots,x_n].$$

This would identify the explicitly constructed commutative subalgebra with the full center in the non-semisimple setting, extending the role of the Jucys–Murphy-type elements in separating blocks. The source does not state a resolution of the conjecture.