How to CARD QUERY cards in children blocks whose parent blocks have a specific hashtag?

Hey all, I want to {{cards}} query children blocks whose parents have the hashtag #math-exercises; I tried doing it with {{cards #math-exercises}} but it doesn’t work. How do you do it?


Thanks in advance.

Update: Solved it but it’s super weird; while the {{cards}} query {{cards #math-exercises}} doesn’t work, the queries {{cards [[math-exercises]]}} and {{cards (OR #math-exercises)}} work. Is this a bug (referring to {{cards #math-exercises} resulting to no matches)?