This field should always be populated during block processing unless secondary plain slots are enabled (which don't contain a VRF output).
It is set in on_finalize, before it will contain the value from the last block.
on_finalize
This field should always be populated during block processing unless secondary plain slots are enabled (which don't contain a VRF output).
It is set in
on_finalize, before it will contain the value from the last block.