I think I see this a bit differently than others might.

I think this is a significant problem of your T's and you can either try to address it, and maybe your T can grow through it; or you can try to address it, and maybe your T can't grow through it, and you'll need a new T.

This doesn't feel to me like a conversational style or habit. It feels deeper and more significant.

A lot of time and attention is paid in T training to listening, both as behavior and as theory. If your T's problem is only a behavioral issue, perhaps it can be changed if you bring it to her attention.

But I suspect it goes far deeper than this because you say she interrupts you when you are talking about highly emotional stuff. Generally the more highly emotional the content, the more Ts actively listen and not interrupt the flow. So why is she interrupting you? What is prompting her to behave in such an uncommon way?

I suspect something in the content or manner of your communication is triggering your T in a way that is not therapeutic for you.