I only seem to damage black props, so I keep collecting silver. If you have two unused BLACK DJI 9443 props, I'll trade you for two of my unused SILVER ones of the same make.
That's kind of funny because I have the same thing happen to me. I haven't broke one in a while but when I did it seemed that every time it was a silver one. Now I also have 3 non-paired silver props, I feel your pain!
Maybe its the silver ones that trees/branches are attracted to?