Minecraft wiki entry for Development_versions, associated text: Fixed an issue with animating structures when chunks were unloaded and the animation not continuing.
Attachable items created in 1.16.2 and before will not render for their player in first person. Attachable items created after 1.16.2 will render for their player in first person unless they are armor.
Custom blocks now can only drop default state when broken, even with Silk Touch.
Fixed validation of 'render_offset' as string in component item JSON schema.
The /schedule command will once again execute from the entity it originated from if the area was already loaded.