Scattering fan–mutation fan coincidence conjecture

Let $B$ be an exchange matrix. The scattering fan–mutation fan coincidence conjecture. The scattering fan $\operatorname{ScatFan}^T\!(B)$ coincides with the mutation fan $\mathcal F_{B^T}$ if and only if either

1. $B$ is $2\times 2$ and of finite or affine type; or
2. $B$ is $n\times n$ for $n>2$ and of finite mutation type.

The conjecture characterizes exactly when the scattering fan and mutation fan agree; in general, the scattering fan is known to refine the mutation fan, while the asserted converse classification is not resolved in the supplied source.