Xbox profile picture doesn't update since last versions

Since several new versions, the xbox profile picture doesn’t update when we change it.

Talked here and here for example :

https://www.reddit.com/r/Minecraft/comments/1hpfrp0/why_profile_picture_wont_update/?rdt=57295

https://answers.microsoft.com/en-us/xbox/forum/all/pfp-changed-on-xbox-appwebsite-but-not-updated-in/76924523-2578-4e72-a84a-7ad804548f56