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Does the Fleming-Viot particle system with more than two particles admit an explicit stationary ancestral circulation formula analogous to the two-particle case?

Related: Yaglom limit theorem for killed Markov processes, Kingman coalescent and its extensions, Moran model stationary distribution in population genetics

The Fleming-Viot particle system is a finite population model where particles diffuse on a domain and, upon hitting the boundary (being killed), are instantly reborn at the location of a uniformly chosen surviving particle. For two particles, researchers have recently derived explicit formulas describing the long-run ancestral circulation, meaning the statistical pattern of which particle line of descent dominates over time. The open problem is whether analogous closed-form or tractable characterizations of the stationary ancestral circulation exist for systems of three or more particles, where the combinatorial and analytic complexity explodes dramatically due to simultaneous interaction among multiple lineages.

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