Armor bar not there, despite having armor equipped. Elytra not working either.

So. I logged into the multiplayer server that I have and went to the end. I am not sure wether my armor was working after teleporting to the end, but when i jumped into the void, died with KeepInventory=true, i respawned with all my stuff, except none of what I had equipped was working. My elytra doesn't work either. I tried swapping, dropping and picking up the armor, but nothing helped.