Why did this girl block me on Instagram for no reason?

[Anonymous]

So I made an instagram a couple weeks ago, and have like a hundred followers now. There's this girl at church I know that I requested a follow, she accepted and she follow requested me too (both private accounts). This was about a week ago. A few days ago she jokingly made fun of my posts. Anyway, today there was a lake activity with our church, and we were just fine. I did nothing to her, and we said small things here and there. We were in the same car the ride back, and she sat next to me when there was an opening. She barely said much to me, but I didn't do anything to her too. Everything seemed just fine in the end. Later today I go on instagram I just post a picture of the lake. Then I find out later with an app that she unfollowed me, and then found out she blocked me too. I was so confused because I don't know what I had done. Does anyone know why? (I don't have a crush on her by the way but I just need to know why she blocked me)

[Anonymous]

If you don't know, then how are we suppose to know? She probably decided that she doesn't like you during the lake activity so that's why she blocked you.

[Ephemera1]

Something must've happened or she just didn't find you interesting.