It is normal and natural. 6 months is not nearly long enough to cleanse away the harm or desire for the final word. In your case, it sounds like you want your ex-T to see you standing tall and acknowledge, or at least consider, the damage she caused. We all would love that. But consider that even if you do (as it sounds likely) pass her casually you still will never know what she has or has not justified in her head.
Discuss this with your new T, but expect that he/she will tell you the same. Walk tall and confident (even if that's not how you feel), living well is the best revenge. Is she spots you, let her see someone who appears to be doing soo much better without her. Your head and heart will eventually catch up! Best!