Ok nobody is going to talk about this?

Season 3 episode something. When the umbrella academy meets the sparrows, Diego gets shot with the venom that makes him imagine things, correct? So does five later on. But the girl that shot the venom, (I forgot her name don’t sue me) could clearly see five kissing Delores, who wasn’t even there. So we now know that we can see the person doing what they think is real. So how come Diego wasn’t dancing to the others when he got shot by the venom..?