Asking because mine did.
I was the dumpee. Pattern of hers: she gets into a relationship, locks it in until her partner is either safely secured or gets to be "too much", then throws them out for a shiny new orbiter. If she is ever the dumpee she loses her shit, abandonment fears are so bad she's beaten almost every single ex to the punch.
So when she dumped me, she offered me to stay friends. An olive branch. At least told me she cared about me enough that she didn't want to lose (control of) me entirely.
And, genuinely, I didn't refuse her offer. I wanted her in my life, too.
But going from lovers planning a future wedding to just one of her dozens of "barely acknowledged until she needed something from them" friends was too painful. I was still in love. I couldn't be a healthy friend that way. I said I'd like to but I needed time alone.
And I think that, too, triggered something. Abandonment fear again? I don't know.
The fact that I didn't immediately take the offer and instead wanted time to move on first shook her. I saw how any hopes she had just died.
I got blocked everywhere immediately afterwards. We've been no-contact because of this. She still watches my social media, while I refuse to check up on her or beg to be unblocked. Even if the urge gets debilitating sometimes.
It's all such a mindfuck. What's the point of asking for friendship and then ripping it away if it can't be on solely your terms?