The normalized flat Jones–Krushkal polynomial conjecture for almost classical flat knots

Let $\alpha$ be an almost classical flat knot, and let $\bar J_\alpha(z)$ denote its normalized flat Jones–Krushkal polynomial, defined using a minimal diagram of $\alpha$.

Normalized flat Jones–Krushkal polynomial conjecture. For any almost classical flat knot $\alpha$, the normalized flat Jones–Krushkal polynomial satisfies

$$\bar J_\alpha(-1)=1.$$

This was observed empirically for every almost classical flat knot up to $10$ crossings. Whether the identity holds for all almost classical flat knots remains open.