Earlier today, these Forzathon challenges have went live as indicated in this screenshot:

I've attempted to complete the challenges listed, but none of my progress is counting towards completion of each of those challenges. For example, this drift score should have completed the first challenge for To the Slopes! yet progress is still showing up 0/10000:

I've performed a full shutdown of my Xbox One by holding the power button for the time required to do so and then took and share a photo in-game to see if a reboot resolves this issue which should progress Creative Corner, but the game still isn't counting progress for any of the challenges which is currently showing up with no progress for any of them. Checking the achievements list for these challenges, there is no start date listed, only an end date of 2/9/2018, which may or may not have anything to do with this issue.
If anyone can look into this issue, it'll be appreciated.
Gamertag: Rusted Ace2013
Current progress shown in-game:

Edit: Taking a look at the challenges over on the Xbox website, the Forzathon challenges are not showing the start and end dates for each challenge that is live in-game such as #Forzathon To The Slopes! as of 2:27 PM EST(11:27 AM PST):
#Forzathon To The Slopes!It appears that until the proper start and end dates are added for each challenge, there is no way to complete them.
Edited by user Friday, January 26, 2018 11:27:32 AM(UTC)
| Reason: Not specified