It does sound like transference is interfering with your perspective and your T is doing what she can to deal with it in a healthy way.

She doesn't text with patients. She texted with you during a time of crisis. Losing one's mother is a major crisis in anyone's life and she broke her rules about texting because it was the right thing to do at the time.

She's not punishing you by going back to the original rules. She's setting a healthy boundary. And, naturally, you don't like it! I mean, I wouldn't like it either. You just lost your mom and now it feels as if your T is pulling away. But she's not.

I don't know what you're feeling. But I know if I was in an identical situation, my abandonment issues would be triggered all over the place. First, by the loss of my mom and then by my T setting a boundary on me. That can feel like a rejection, but it's not. It's a good boundary, IMO.

Talk to her about whatever it is that you're feeling and, as others said, don't do anything rash out of hurt feelings over text messages and transference. It just takes some time for any of us to adjust whenever rules change or boundaries are set. It takes time to process and accept and it isn't always easy. Well, at least not for me. I don't think it's easy for most people.

I wish you the best.