Universal quantization conjecture for smooth symplectic resolutions of Lusztig slices

Let $\widetilde{\mathop{\mathrm{Gr}}{}^\lambda_\mu}$ be a smooth symplectic resolution equipped with a conic $\mathbb C^*$-action, and let $Y^\lambda_\mu(\mathbf R)$ be the associated family of truncated shifted Yangians. Universal quantization conjecture. The family $Y^\lambda_\mu(\mathbf R)$ is the universal family of quantizations of $\widetilde{\mathop{\mathrm{Gr}}{}^\lambda_\mu}$. The source says this is a precise version of an earlier conjecture and supplies no evidence of a general proof or disproof.