Akbari–Ashrafi conjecture on connected reduced power graphs of simple groups

Let $G$ be a non-abelian simple group. The Akbari–Ashrafi conjecture. The reduced power graph of $G$ is connected only if $G$ is isomorphic to an alternating group $A_n$. This conjecture concerns connectivity in reduced power graphs; the supplied context does not state whether it has been resolved.