I presume OP is referring to an issue of Decorated Pots that have been crafted with only Brick items, without using Pottery Sherds:
It seems a plain Decorated Pot will not drop ANYTHING if broken by a tool, whilst it should drop 4 Bricks. This seems to happen if and only if the Decorated Pot is made entirely of Bricks; including even one Pottery Sherd makes the Pot drop every component, including any Bricks used
Video details included.
Could not reproduce in 1.21.10, any custom dimensions created with data packs seem to remain after the data pack itself is deleted, and nothing affects the Nether nor the End, they’re still accessible through portals, and /execute in command functions in all dimensions, both vanilla and custom.
(My testing may have been off, but I think I followed the original reproduction steps correctly.)
Can confirm in 25w41a
Can confirm it is fixed in 25w41a, because visibility of vignette effects, including world border warning, are now controlled by the “Show Vignette” setting, thus making general graphics settings not affect it.
Also affects Skeleton Horses, both likely use the same AI functions
Can confirm, change is also inconsistent with Skeleton Horses, which do not despawn on Peaceful Difficulty
Not a bug per se, the issue is caused simply because non-default languages don’t yet have translations for brand new content. May be worth to mention it on Crowdin, but likely Mojang staff is pre-emptively aware, and will make the translations when it is relevant.
Can confirm from game recipe data files:
Nautilus Armor are absent from [material]_nugget_from_blasting.json files, but are present in [material]_nugget_from_smelting.json files, which causes them to be smeltable in normal Furnaces, but not Blast Furnaces
Can confirm that this bug happens in 26.3 Snapshot 2, and does NOT happen in 26.2 nor 26.3 Snapshot 1.
It appears the Arrow entities do not lose the
can_breaktag at any point, including when the world is closed and reopened, so issue must stem from a different source.