I think that is strange, but im not a doctor.

Fellow cancer patient here just weighing in with what I’ve been able to find. My doctor was originally going to put me on Casodex and Lupron. I opted for ORGOVYX instead.

Casodex does not reduce testosterone but affects your body’s ability to utilize it. It is normally prescribed with a second drug like a Lupron that does reduce testosterone.
https://www.drugs.com/tips/casodex-patient-tips

I strongly suggest that you have a conversation with your oncologist. Here in the forum, we're not experts, and we don't have access to your medical records in any case, so we have to way to reply to or verify anecdotal evidence. Your oncologist can explain what you think you're seeing.