Dany Hi Daniele. You could check in the database for the catchthefish_fishes
table. The discussion_id_placement
/post_id_placement
/user_id_placement
column will let you know where it currently is.
Once you find the fishes from the database we'll know for sure whether it's a bug or not 😇
Your settings look fine. The user activity is indeed the value of "last seen online at". I think that this extension ignores the "disclose online" user setting, so anyone recently online can get fishes, even if they have hidden their online status. If that's the case I could try to fix that to honor the privacy setting.