Happy to help you out here hmm that's an interesting query! Can you send me a screenshot of the query when it does work? I'll try to decipher between the two
I previously asked for help (which was great) about a similar use of 'IN' and was told about the use of String_split to make a comma separated version which is the expected format. But I've tried without the string_split and I've tried using a transfomer to filter results that were only selected in the table but I ran into problems (I think it didn't recognise the reference to the table SelectedEvents so perhaps it was out of scope?).