Outdated list item poster and title when logged in

A list I’ve created over two weeks ago is stuck with missing posters and outdated titles when I’m logged in. If I log out or open the list in another browser where I’m not logged in, the items appear with the latest poster and title. When I log again, I see the outdated items again.

This is the list: https://trakt.tv/users/sttz/lists/contemporary-arthouse-guide-documentaries

When I’m logged in I’m seeing:
#6 Chinbotsu Family / No poster
#7 さとにきたらええやん / No poster

When I’m logged out:
#6 Chinbotsu Family / With poster
#7 Welcome to Sato / With poster

If I visit the film pages when logged in, I do see the updated title and posters.

Why do I see different content when logged in or not, are the list items somehow cached in my account? Is there a way to get them refreshed with the latest information?

Note: I’ve had to add those films on TMDB and then imported them to Trakt. The information and posters didn’t sync over immediately but I’ve added them to the list anyway. The pages then updated with the latest information some hours later.