Ovulating during medicated transfer cycle

Has anyone ever ovulated through a medicated transfer cycle?

It’s happened to me not once, but twice now. Two canceled cycles.

I’m not understanding what’s going on and my clinic is also at a loss. I had a textbook perfect successful transfer two years ago. My nurse literally asked if it was possible if I was mistakenly already injecting myself with estrogen as opposed to Lupron.

The first time I did take a day of birth control late so they at least have some reasoning as to why it could have “snuck through” but she said even missing one day it would still be very hard to break through and ovulate. Zero explanation for how it could happen a second time.

I do not have a cyst or anything.

Right now the plan is to just try the same thing a third time and hope I don’t ovulate because they literally can’t figure out what’s happenning. 😩