Isotypic rigidity conjecture for Chevalley groups

Let $G_\Phi(R)$ be a Chevalley group associated with a root system $\Phi$ over a ring $R$, and let $H$ be a group isotypic to $G_\Phi(R)$. Isotypic rigidity conjecture for Chevalley groups. Then there is a ring $S$ such that $H$ is isomorphic to $G_\Phi(S)$ and $R$ and $S$ are isotypic rings. This refines the general rigidity question by predicting that isotypic Chevalley groups arise from isotypic coefficient rings, while the broader problem of classifying isotypic finitely generated groups remains open.