React Three Fiber InstancedMesh animation freezes in Firefox when using key-remount + useEffect for per-frame GPU writes

An animated InstancedMesh scene (lerping between Poisson-disk positions and a Cartesian grid) renders correctly in Chromium but never progresses visually in Firefox. Instance matrix updates and shader uniform pushes appear to have no effect. A companion EdgeSegments component also freezes: segment colors set in a useEffect stop updating mid-animation in Firefox only.

The animation loop was confirmed running (frame counter incremented normally in Firefox). needsUpdate was being set to true. The bug was invisible in Chromium.