In the past few beta builds, any data-driven blocks that were added by an addon no longer function. They are not present in the creative inventory and they cannot be given with the /give command. Additionally, any worlds that previously had custom blocks placed in them would have those blocks deleted when loaded in the current beta. If this is a result of changes made to the way blocks are coded, these changes are not documented in the add on documentation pages.
Comments 2
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
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Do you have experimental gameplay on? Does the block have the
register_to_creative_menuproperty set?