I think that the answer is "yes". My RO told me that all of the RT side effects would be over and done with in two months, but at just a few days short of a year out, I still have most of them.
I think the ROs gloss everything over. I have seen many discussions that RT can cause delayed problems even multiple years out. I can't give you a link, but it was a very serious concern for me.
My incontinence varies. At the start of adjuvant RT, I was at a solid one pad per day, no more than that. At the end of RT, I used generally two, often three, and rarely four. After about nine months, I was back down to generally one, sometimes two, and rarely three. over the last three months, it has been all over the place, completely unpredictable. If I'm travelling, I have to plan for three a day just in case.
Is it related? No clue.