First off how do you know that this is happening as you day? You have not seen the rifle, I did not even bother taking it apart at this time.
I also find it hard to believe that there is a broken part as I cannot cause this to happen when I want it to. I had it happen 2/3 on the first 3 tries, one of which is when it went off. The next 100 or do times it did do it.
I will be taking it to the gunsmith, not going to be messing with it myself.
I know because this was the cause in every case of firing on safety release, where the trigger had not been misadjusted, that I saw in the years I was doing Remington warranty service. I did not say there is a broken part. A flawed or faulty part, perhaps, but unlikely to be a broken part.