Castsequence with modifier

Simple question, this is not working for me but I was wondering if there was a way to make it work. I have a castsequence with [@player] on one of the spells, but it is trying to cast all the spells on [@player] instead. Is this a bug, does anyone know if it is possible to have a castsequence with 1 spell say, @focus and 1 spell @player?

/castsequence reset=60 spell1, spell2, [@player] spell3, spell4

Something like that–should it work? Not sure if this is a bug or not.

Options on castsequences apply to the entire sequence. You can’t apply them to a single spell in the sequence.

https://wowpedia.fandom.com/wiki/MACRO_castsequence