The advancement menu breaks in such a way where only the path to an advancement shows under certain conditions. These conditions being that said advancement is flagged as hidden, and that the player viewing the advancement menu has an advancement with no display childed to the hidden advancement. This is purely a display issue, and has no impact on purely vanilla worlds.
To reproduce:
In a datapack or mod, create two separate advancements.
Make one hidden, and the other parented to the hidden one. The hidden one shall have a display field, while the child advancement shall not.
In-game, grant yourself the displayless advancement, but not the hidden one.
Check the advancement menu for where the hidden advancement would be.
Expected result
Either nothing shows up, or the hidden advancement is revealed. (If you are to fix this, please go with the latter. It would be pretty useful :3)
Actual result
The path to the hidden advancement is revealed, but the advancement itself is not, resulting in a path with a very visible cutoff.
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Please attach a minimal setup data pack that can be used to reproduce this issue.
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