Broken ACL editor shown after creating home share

The ACL editor is shown after creating a new SMB share with the "Use as Home Share" option enabled (set purpose to "Private SMB Datasets and Shares" first to enable the checkbox). In the latest RC, it no longer shows the existing ACEs and is otherwise non-functional. The user/group (owner) dropdowns are empty, applying an ACL preset doesn't change anything, and manually creating an ACE for a user/group isn't possible because the user/group field is missing. The save button is also never enabled and clicking cancel takes you to a blank page.