My album's collage shows 4 albums from different artists, my artists collage still shows only one artist.

[KR0WLEY]

i have listened to 4 different artists this week, and 4 different albums but my artist collage doesn't seem to update, apparently it just gets the URL from the first collage i did today. loads so fast and returns the same collage as today's' first, showing 1 artist. But if I change any option, it generates a new and updated image. :/ website, google chrome.