1.15.2-1.12.12
Collector crystal starlight links to other objects sometimes break client-side when loading the chunks they're in. It usually occurs when the origin and the destination are in different chunks. Starlight transferred by lenses can also be affected (but I haven't tried it with prisms).

This also can cause issues with crafting when a collector crystal provides the necessary starlight for crafting, since the client thinks there's not enough starlight.