So I just mined a whole bunch of iron and decided to make my first set of iron armor. I made one of each. Still had quite a few bars leftover so I put them in storage. After a while I noticed that my armor was starting to go down so I went back to my anvil and I put in the headpiece and the foot piece and I was able to add an iron bar and repair both of them respectively. But when I put in the leg piece and the chest piece and iron bars it wouldn't let me it was just red and I gave no reason why it would not allow it. The armor doesn't have any enchantments on it as I haven't figured out how to do that yet. What reasons would prevent it from being able to be fully repaired? I watched several videos on repairing armor and none of them were helpful.

For the record I'm playing on a Sony PlayStation with psvr1VR it's apparently a Bedrock version