I am trying to get all the minecraft Xbox one achievements but I can't seem to get the beginning achievement. I am sure the world has had and has no host privileges or creative mode in it at any point. I can get other achievements but not this one. I first tried it and got the achievements The Beginning? (spawn the wither) I died on that attempt so I quit and reloaded my save to restart it again. Then I beat it and pick up the nether star but did not get the achievement. I reloaded my save about 4 times so I went and tried another achievement. Thea one worked. I went back and tried to kill the wither again and succeed but still did not get the achievement. I have no clue what to do but I would accept any help I can get.
Some achievements always seem to be bugged. They fix one and another stops working. Years ago when I first started playing I qualified for several that did not come to me, and then one day I was sniping skeletons from a high place and got the Sniper Duel achievement, and five unlocked all at once, added like 80 to my gamerscore, and scrolled through all the announcements. That was at like tu19 or something like that, so who knows if it will work now, but getting other achievements could help the game realize you qualified for, but weren't granted, some.
Heres a link to the bugtracker if you want to repport it.