One of the types of ads on Facebook - Carousel Ads. They consist of a carousel in the 2-5 images and / or videos, titles and references or calls to action in one advertisement.
At this point in time, service OWOX BI ROI does not support the full functionality of this type of ad. The main problem - the ability to mark each of the carousel items by different UTM-tags, which complicates the process of allocation of costs on the ad / campaign when imported into Google Analytics.
However, if all the elements contain the same links that match the main link - the import will take place normally.