Items rendering below UI breaks RP currently used feature

Bug:

After probably this fix MC-276264 , a technique used in datapacks to make custom inventories has caused them to no longer look as good as they used to.

In previous versions, when scaling a item to a bigger size, and rendering it over the inventory, the item was never cut off and looked as shown in the attached picture.

[See ‘example-prev-versions-25w10a.png’]

Now, by rendering the inventory above the items, we have lost this feature.

[See ‘example-25w16a.png’]

You can test it with the RP attached and giving yourself this item:

/give @s minecraft:stone[minecraft:custom_model_data={strings:["ui_empty"]},minecraft:item_model="example_issue:ui_item"]

I don't know if it's related to that fix or not, it seems like it should be the case, and I know it's probably that it's a WAI report, but I also think it's important to know what things are broken so we can support them in other ways in the future. (Hopefully in the near future).

Attaching two more advanced examples just to clarify its usage. The “good” one and the “bad” one.