When I entered my minecraft house this was the first thing I saw. When I opened the "1st part" there were the items that were normally in the box and in the second part nothing.
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Do you use any data packs or resource packs? Also, can you attach a screenshot while looking at the right half of the chest with the F3 screen being enabled?

ok, as you can see it's still the same problem with the Christmas textures

In MC-166495 someone suggested you can reinstall the game(by deleting everything in the .minecraft folder except for saves) and that fixes it,
Can you try that?

or can't I just reposition the chest

Okay, I just reinstalled the chest and it's working.

but I wonder how it happened