Clients launcher large number of spam:
[xx:xx:xx] [Server / Client thread/ERROR]: Item entity xxxxxx has no item?!
Reproduce video:
https://www.youtube.com/watch?v=jvLk_PqD0lY
Reproduce steps:
1. ✔ Transmitter settings:(Launcher Visibility = Keep the launcher open)
2.Use Silk Touch damage Frosted Ice.
3.Saved back to the menu screen.
4.Enter the world again.
5.Observation of launcher.
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This is not a repeated of issue.
This issue is derivative / relates to MC-90635
This is the follow-up to save and loading.
This issue reproduces way different from MC-11834

It is eventually the same.
Game creates air item (MC-90635)
(After reloading, estimated) Game notices that
Item
tag is invalid and removes it or does not load it at allThe item has no
Item
tag (MC-11834)
Edit: As you said it is a "follow-up" so you should anyways add the information to MC-90635 and additionally the title / summary of this report should contain the fact that it is caused by frosted ice
Has already replied to MC-90635