Discovered while testing MC-218022.

For a comprehensive list of other examples of issues with item positions in the Creative inventory, click here.

All tickets associated with item placement in the Creative inventory are valid for cases introduced in 1.16 and later as per this comment. Exceptions exist, which are valid for their own reasons.

The bug

Netherite is very strongly implied to be a metal through several of its mechanics - its existence as an ingot, the presence of gold in its recipes, its sounds, its uses in recipes, and so on. As a result, it would be expected that its full block form would therefore be placed among other metals in the Creative inventory, but this does not happen.

How to reproduce

1. Open the Creative inventory
2. Locate Block of Netherite in Building Blocks
3. Locate Block of Iron in Building Blocks
4. Locate Block of Gold in Building Blocks
5. Note that there is a considerable distance between these items.