Agreed with @HipHopBunny that even weeks following a spay, hormones take awhile to settle down. It is typically called the post-spay/post-neuter hormonal “spike”.
Notably, if your rabbit was spayed at an appropriate age, it is likely a large part of her ability to get along with your dog was that she was not experiencing any hormone-driven instincts. Young rabbits not yet reaching puberty get along very well with other animals/rabbits because they don’t have hormones telling them about territorial defense and mating.
It will take time, but you will want to really closely monitor those two and not let them interact without your supervision for the near future. She needs to settle down hormone-ally, and the relationship may need to be rebuilt “back up”, as it were.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.