Ziegler–Alon–Drewnowski–Łuczak conjecture on stable Kneser hypergraphs

Let $k$, $r$, and $n$ be positive integers with $n\geq rk$ and $r\geq2$. An $r$-stable $k$-element subset of $\{1,\dots,n\}$ is one in which any two elements have cyclic distance at least $r$. The hypergraph $\mathrm{KG}^r(k,n)_{r\text{-stab}}$ is the subhypergraph of the $r$-uniform Kneser hypergraph induced by these $r$-stable subsets.

Ziegler–Alon–Drewnowski–Łuczak conjecture.

$$\chi\bigl(\mathrm{KG}^r(k,n)_{r\text{-stab}}\bigr)=\left\lceil\frac{n-r(k-1)}{r-1}\right\rceil.$$

The source attributes this conjecture to Ziegler, Alon, Drewnowski, and Łuczak. The supplied text does not give evidence that it has been resolved.