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Good day, I am using a criteria with a custom key. That works fine when passing an ID, e.g. when using "People who bought this, bought that". However, it is not working when passing multiple IDs, whatever the format is. Are the recommendation logics not able to work with more than one ID? Or am I doing something wrong with the formatting of the custom key? Thanks in advance.

Good day, I want to set up a recommendation where the last bought products of the individual user are listed in descending order by date. The intention is to create a rebuy reco ("Do you want to buy this articles again?") for frequently bought products. I can see in the debugging mode that the previously bought Ids are included in the product request, but I am not able to create a critera for that. I only have the possibility to address the very last bought product, but not the "last bought prod...