Why does my baby daddy’s girlfriend keep blocking/unblocking me on Facebook?

She’s been doing this for the past year and a half now. She keeps blocking/unblocking me on Facebook. I think she even blocked me from baby daddy’s profile too. What is her deal? I have never talked to this girl in my life. I don’t even bother my ex only when he reaches out first. I seriously cause them no trouble, and I just keep to myself.
Why does my baby daddy’s girlfriend keep blocking/unblocking me on Facebook?
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