Minecraft wiki entry for Development_versions, associated text: MC-173013 – Cast fishing rod is rendered as not-cast in first-person when replaced with another fishing rod.
MC-175177 – Exhausting, breaking or obstructing the respawn anchor creates ghost blocks in the overworld when breaking blocks.
MC-175241 – Carpets obstruct respawn anchors.
MC-175604 – Iron golems do not always spawn in villages.