"hidden": true root advancements not hiding child advancements, causing advancement group to show, but root is still hidden.

The bug, and how to reproduce:

• Create a root advancement with "hidden": true

• Make an advancement with the parent as the root advancement you just made.

• /reload

• Grant the child advancement

• Look in the advancements menu, and the advancement you made will be there, even though the root is "hidden": true.

• Also note that the root advancement icon is not there. See attachment.

Also applies to "announce_to_chat" too.