I haven't seen this mentioned, so I'll add this info. I went back to check my game today, and still no cape. So I equip my 15th anniversary cape, but it is renamed to 15 Year cape. Could this be a part of the bug?? Picure posted above.
Claimed my cape Sunday. Its Monday and it has still not been given to me. And yes I quit, restarted, restarted my xbox, etc. Nothing works.
Same issue here on my single player survival world.. Playing newest update on xbox series s.