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 MCreator forums are still considered and checked by the maintainers.
Custom GUIs with slots set to hold larger stacks can hold larger stacks of custom items, but vanilla stacks are limited to 64 and there is no easy way to overcome this.