Full rectangular Lefschetz collection conjecture for odd isotropic Grassmannians

Let $\IGr(n,2n+1)$ denote the odd isotropic Grassmannian parametrizing $n$-dimensional isotropic subspaces of a $(2n+1)$-dimensional vector space equipped with a nondegenerate skew-symmetric form. A rectangular Lefschetz exceptional collection is a Lefschetz exceptional collection whose blocks all have the same length. The full rectangular Lefschetz collection conjecture. The bounded derived category $D^b(\IGr(n,2n+1))$ admits a full rectangular Lefschetz exceptional collection. This is presented as plausible based on the index and rank of the Grothendieck group; the source provides no resolution, so the conjecture remains open.