Lucky Challenges

I was doing a normal daily challenge (cooking shark), when an interface popped up. This interface was for a so called "Lucky Challenge". I have to burn 320 magic logs on a bonfire to complete it. In 24hrs time!

So i began my research. Both the official and the unofficial wiki has no information about the "Lucky Challenges". So i went to Youtube. Just today (22 jan), a person posted a video. He got a challenge while fishing. The challenge was doing the quest Swept Away in 24hrs to get his reward.

What do you think this hidden update is? My clan guessed it has something to do with being a VIP?