I just played through the entire master chief saga playlist and your system screwed me out of 3 levels I completed them in the playlist they are as follows The Maw, Heretic, and Halo 3s epilogue thanks to this I have to replay this playlist because I didn’t get the achievement I busted by butt to get I want it fixed the location in the playlist makes it impossible to do without starting over simply because I cannot skip into a playlists certain level and it angers me
I’m sorry to hear that happened. The playlist achievements can be a little buggy. I’ve read things about saving and quitting at certain points and skipping cutscenes impacting achievements.
I would post a report of what you encountered here.
Also, check the achievement on your Xbox One and see if it is showing as “Done! Unlocking…” or not.