items' displayName were lost when edit nbt on 1.20+

[JWJUN233233]

as the title said.

[tr7zw]

You are probably either missing the 1.20.3 nbt change or mixing item meta and nbt changes.
See https://github.com/tr7zw/Item-NBT-API/wiki/Using-the-NBT-API#working-with-items

[JWJUN233233]

I used follow methods:
1:

NBTItem nbti = new NBTItem(item, true);
nbti.getUUID("uuid");

//then itemStack lost its name

2:

NBTItem nbti = new NBTItem(item);
nbti.setUUID("uuid", UUID.randomUUID());

nbti.applyNBT(item)
//then itemStack lost its name

[tr7zw]

Both are deprecated and unsupported. Please use

NBT.modify(item, nbt -> {
nbt.setUUID("uuid", UUID.randomUUID());
});

and

UUID uuid = NBT.get(item, nbt -> {
return nbt.getUUID("uuid");
});

as stated in the javadoc/documentation.

If the name or uuid gets lost, you are mixing ItemMeta changes and nbt changes at the same time.