Ergodicity and conullity conjectures for redundant representations

Let $F_n$ be a free group, let $G$ be the group under consideration, and let $X(G)$ be the corresponding representation space. Let $R$ be the set of redundant representations, namely representations $\rho:F_n\to G$ for which some proper free factor $A<F_n$ has dense image $\rho(A)$ in $G$. Let $\mathcal{P}\mathcal{S}$ denote the primitive-stable representations.

Redundant-representation conjecture. (a) The action of $\operatorname{Out}(F_n)$ on $R$ is ergodic.

(b) $R\cup\mathcal{P}\mathcal{S}$ is conull in $X(G)$.

These assertions are motivated by the contrast between proper discontinuity on Schottky and primitive-stable representations and the expected ergodic behavior on redundant representations. The excerpt does not give a resolution, so both assertions remain open.