I don't personally know anyone who is in a similar situation, but repeating zolendronate during prolia cessation, when needed in the first year, is mentioned in publications and in conference presentations (you can find them on YouTube). It seems your endo is monitoring things very closely and cautiously to ensure a safe and successful transition.

@dna41, what CTX level is your endo aiming to keep it under during transition? A level of 280 was mentioned frequently in several articles. Thanks!