Achievement unlocked in-game but not on Xbox

Hi,

I am having an issue with the ‘Win for the Empire’ Xbox achievement not unlocking despite it showing as completed on the in-game profile. This achievement requires the player win a match as the Byzantines, which I have done at least 20 times as I have successfully unlocked the ‘Protecting Constantinople’ achievement.

I recall that shortly after winning my first Skirmish match as Byzantine I closed the game to use a different app and I suspect that this may have interfered given that there is often a lag time in AoE4 between requirements being met and the achievement popping.

I play on Xbox using Game Pass, no mods. I have tried deleting my local save, hard resetting the Xbox, reinstalling on another Xbox and winning further skirmish matches with the Byzantines, without success. It appears that there is no way to re-trigger the achievement requirement as it has already been unlocked in the in-game profile. Any fix would be appreciated!