The pretzel-knot ribbon number spectrum conjecture

Let $p,q\in\mathbb{Z}$ be odd, let $n\in\mathbb{N}$, and let $K$ be the $(2n+1)$-stranded pretzel knot

$$K=P(q,p,-p,\ldots,p,-p).$$

For $0\leq g\leq n$, write $r_g(K)$ for the higher-genus ribbon number and let $\frak r(K)$ denote the ribbon number spectrum. Pretzel-knot ribbon spectrum conjecture. The values satisfy

$$r_g(K)=(n-g)(p-1),$$

so

$$\frak r(K)=(n(p-1),(n-1)(p-1),(n-2)(p-1),\ldots,p-1,0).$$

If true, this would show that the ribbon spectrum can have arbitrarily many jumps of arbitrarily large decrease, illustrating behavior beyond the previously understood stair-step spectra.