Hey there,
I have been testing this bug out for quite a while now. I have the Quicken sacred stone imbued in my Bm's 130 claws but they don't proc at all and I have been using them on bosses and they have not even proc'ed once within the 5 minutes I was constantly hitting them. I even looked at the character screen attack rate number. No change.
Yet, on my sin's 130 dags, they proc fine. I'm wondering if this is a bug or they won't work on claws.
Many thanks,
-VHK