A web radio “track” in the queue can't be moved

Volumio 2.853: dragging a web radio “track” in the queue doesn’t work - drag > animation implies the position has changed > release drag > track reverts to original position - same behavior from Volumio app (Android 7.1) or web browser (Windows + Chome | Vivaldi). A conventional music track can be dragged/ moved OK. Why are web radio tracks treated any differently to other tracks? There are other places where this, from a users point of view, shows up to - Web Radio Favorites distinct from Favorites, clicking the heart or + from playback for a web radio - silently ignored.