  We present the first data-driven result for $a_\mu^{\rm win,lqc}$, the
isospin-limit light-quark connected component of the intermediate-window
Hadronic-Vacuum-Polarization contribution to the muon anomalous magnetic
moment. Our result, $(198.8\pm 1.1)\times 10^{-10}$, is in significant tension
with eight recent mutually compatible high-precision lattice-QCD
determinations, and provides enhanced evidence for a puzzling discrepancy
between lattice and data-driven determinations of the intermediate window
quantity, one driven largely by a difference in the light-quark connected
component.
