This option would make it impossible to have the block in an inventory, similar to blocks like fire or bubble column. Setting the creative tab to null is a workaround, but the block can still be obtained with commands (ex. /give)
MCreator issue tracker has been migrated to GitHub.
Existing tickets have been migrated to GitHub. Please open new tickets on the GitHub tracker instead. If you do not have a GitHub account, all feature requests and bug reports from forums are still considered and checked by the maintainers.