The bug
The texture used for blocks and items for which no texture is defined was changed in Bedrock Edition update 1.20.80 (which was released considerably after the 1.15 cutoff). This change does not appear to have applied to Java Edition.
How to reproduce
A resource pack is attached to this ticket which makes cobblestone not have any textures applied. This results in it using the missing texture.
Download and apply the attached resource pack
Look at cobblestone
Expected results
The new "no texture" graphic would be used: dirt with a dark question mark.
Actual results
It uses the old missing texture instead.
How to fix
Make the game use the texture in this case. It can be found here: https://github.com/Mojang/bedrock-samples/blob/main/resource_pack/textures/blocks/missing_tile.png
Further notes
Also attached is a resource pack that "fixes" this issue, by exploiting MC-277702. This produces the expected behaviour for when a block or item texture is absent.
Attachments
Comments 5
I honestly prefer java's texture as it's a lot more clear something is wrong than just dirt with a question mark on it.
That texture is used for blocks that are in the world but not defined in any behavior pack. It is unrelated to the missing texture, which is used for images that aren't defined in any resource pack
Can confirm.