jeb_ etc. doesn't work - different nametag renamed with and without CMI

[bobhenl]

Description of issue:

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Hi, I got report that jeb_ with nametags doesn't work. I tried it too with /itemname and anvil and really, it doesn't work. I tried remove plugins, and then when I removed CMI, it started working.... Weird is, that name tags created via CMI aren't stackable with these created without CMI. And it has same number of NBT tags. So what's the problem please?

As floris discovered: "using cmi entitynbt showing a diff between the sheep with and without cmi renamed nametags"

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Cmi Version (using/cmi version): 8.7.7.1

Server Type (Spigot/Paperspigot/etc): Paper

Server Version (using /ver): 195, 1.16.3

[CloudeLecaw]

The content of the nbt data is different.

[Zrips]

Determined cause, i will fix from my end, but this is issue with minecraft itself handling differently item rename throw anvil and throw code itself which adds extra stuff to NBT data which no longer gets recognised as valid easter egg. So basically, initiated by CMI, messed up by spigot and then failed by client...
In any case, next version should work properly.