changes to my armor!

so i played and got the "skeleton legs" and "black mask". but when i left the game and rejoined the legs and mask had turned into golden legs and a leather helmet. they have the same properties as before the change, its just that i wanted them to look the way they did (thats why i got the mask). i like when they look uniuqe.
if anyone knows how to fix that please help

thanks

edit: i bought the black mask again and it turned into a leather helmet when i left and rejoined

 

textyre glitch ig

 

well the item changed compleatly from chainmail to gold

 

It’s the same stats so no need to worry

 

the thing is that i liked when they look special. like the mask looked like a wither head