Welcome to the forum.
Don’t let yourself worry too much about your eldest, she is going through some interesting times of her own due to her age, I don’t think it’s an issue with you.
It’s lovely that your little one didn’t want to leave you, she obviously loves you. In a lot of ways young kids live in the moment, it’s far more upsetting for you to say goodbye after your time together, it’s just that she doesn’t yet know how to express it properly.