Consider this: Most of the blocks in the game don't burn with fire, with normal wood being an exception. However, for every single one of these cases (minus netherite) the item form always burns in fire and lave. Including Bedrock

Also, don't create new unnecessary labels

nether "woods" are marked as "non_flammable_wood"

This issue is invalid. This is a feature request.

Works as intended, even non-flammable blocks like stone will burn in fire.

Did netherite block is marked as non-flammable?

Thank you for your report!
However, this issue is Invalid.

You have posted a feature request or a suggestion. This site is for bug reports only.
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All items in Minecraft are destroyed by fire, with the sole exception of Netherite items. It does not matter whether they are flammable or not.

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Ok