After the last update 1.20.50.22, armor that is customized with some ore became completely broken and without texture, as you can see in the display.

The steps to make the bug are in the attached video and also described above.

And only with armor carved with some ore.

Enchanted armor is NORMAL, not related in any way to MCPE-174535 which reported that enchanting armor caused a similar error.

This is not the same bug reported in MCPE-174535.

I'm not using any textures or modifications in my game.