The banner ads are in the wrong format for the right-hand ad slot:
These kinds of ads are not useful (because most of it is cropped) and should be excluded from being shown in that spot.
Upon noticing the issue I reached out to the client, as it appears to be caused by an update on their end. That particular placement is now turned off until I receive word that it is fixed.
I'll post any relevant updates here.
Thank you for keeping an eye out!