The Banner Textures Name (Textures) Error

this bug likes "banner_diagonal_left.tga" textures is "diagonal_up_left.png" on Java Edition, On 1.15, banner is not only a textures, All Texture of Diagonal banner is turn upside Down on Bedrock Edition, on 1.20, Bedrock Edition with Shield Patterns, All Patterns on Java Edition, so This Bug Be exposed.