Broken leather armour

The problem I have encountered here happened when I wanted to dye leather armour.

I was testing out the mechanics of Minecraft bedrock to be sure all of them were perfectly functional, when I found that the leather armour (specifically the non-dye-able areas of the leather armour) in the UI were invisible, I thought it was a problem with the texture pack, so I reloaded but no avail as it said that there were "No errors found".

There is an issue in the new "The official beta Texture Update Pack. Under Development".