Why does ?populate=* only show one of my relation fields?

So I have a content type that has 2 relations, airport, and cards. When I query my API via http://localhost:1337/api/lounges?populate=* I only get the airport relation, if I do http://localhost:1337/api/lounges?populate=airport I also get the airport relation, like I expect. For some reason, despite having 2 relations that are built the same (one to many) I am only able to get one to return data. Am I missing something?

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You might have to grant the find and findOne permissions of that relations collection type to the public role.