Dog play style intensified with age. Concerning?

I’m looking for perspectives on my dog’s shift in play behavior.

My mini poodle turned 1 in October. She’s been in a weekly puppy play and train class since she was ~8 weeks old (highly supervised free play plus training). Historically she’s been very socially flexible—different play styles with different dogs (chase, role reversals, mutual mouthy play). One isolated incident months ago where she snarled at a younger puppy with sharp teeth, otherwise no issues.

Lately, there’s one dog she’s known for months who she’s become relentless with in class:

-repeatedly pinning him

-very loud play growling/barking

-hard time disengaging

He is a few months older than her, similar sized, both of them are fixed.

It still looks playful but wayyy intense and the play is very asymmetric. The other dog doesn’t correct her or remove himself, he just rolls over, so the trainer has to step in and give him breaks constantly. Without intervention, she’d keep going.

Worth noting:

-this is only with this one dog

-she is not generally pushy or reactive

-with other dogs, play is either balanced or she’s the more submissive one

She also goes to dog daycare once a week for ~5 hours because she doesn’t like being home alone. At daycare she’s very stimulated but not chaotic—lots of walking around, observing, sniffing butts, tail up, alert but not stiff. She plays in short bursts occasionally, enjoys enrichment (bubble machine), and seems comfortable there. Shes always excited to go through the doors.

My questions…

Is this kind of persistence and intensity with a single dog a normal part of social maturity around 1 year old?

At what point does this become a behavior that should be actively prevented from becoming a habit vs. “dogs sorting it out with management”?

Could once-weekly daycare be contributing by increasing baseline arousal or reducing sensitivity to disengagement cues, even if she’s not playing hard there?

Or does this sound more like a specific mismatch where the other dog’s lack of boundaries is allowing her to rehearse controlling play?

I’d love to hear thoughts!