Brešar, Klavžar, Rall, and Wash's packing chromatic number conjecture for subdivisions of subcubic graphs

Let $G$ be a subcubic graph, and let $D(G)$ denote its subdivision, obtained by replacing each edge of $G$ by a path of length two. The packing chromatic number $\chi_p(G)$ is the minimum $k$ for which $G$ has a packing $(1,2,\ldots,k)$-coloring, where a packing $(s_1,s_2,\ldots,s_k)$-coloring partitions the vertex set into classes $V_1,V_2,\ldots,V_k$ such that the distance between distinct vertices in $V_i$ is at least $s_i+1$. Brešar, Klavžar, Rall, and Wash's conjecture. The subdivision satisfies

$$\chi_p(D(G))\leq 5.$$

This conjecture concerns whether the packing chromatic number is uniformly bounded for subdivisions of subcubic graphs; the source presents it as a conjecture following an earlier question by Gastineau and Togni, and does not state a resolution.