Shklyarov's normalization conjecture for the higher residue pairing

Let $Q$ be the polynomial ring and $f$ a polynomial as in the source, let $n$ be the relevant degree, and let $c_f\in\mathbb{C}$ be the constant such that the canonical pairing on $HN_n(mf(Q,f))$ corresponds under the Hochschild–Kostant–Rosenberg isomorphism $I_f$ to $c_f u^n$ times the higher residue pairing $K_f$ on $H_f^{(0)}$. Shklyarov's conjecture. For any $f$,

$$c_f = (-1)^{n(n+1)/2}.$$

The prediction specifies the universal normalization constant relating the canonical pairing and the higher residue pairing under the HKR isomorphism. The supplied text gives no resolution status for this prediction.