When I went online, she goes offline. Do girls do this intentionally?

Hickary
I'm not talking about fb where you could spend browsing and go immediately offline when you saw that someone is online. I'm talking about whatsapp or telegram, where you usually need to open a chat with the person to check if someone is online or offline in any random moment. And I realised this happens way too often to become a coincidence with a girl. Just once, I stayed online just a little longer to see if she went back online again. And soon after her status just went on and off as if she's opening and closing the app multiple times. When I checked her time stamp, she's offline just when I went online.

Do girls actually do this?
If so, what's the deal here?
Is she trying to say she's avoiding me?
Because when I talked to her, she doesn't seem interested and brush me off yet this happens.
When I went online, she goes offline. Do girls do this intentionally?
2 Opinion