Lenses and pages are from the Path of the Oracle are temporarily able to be destroyed, players who looted multiple copies are now able to dispose of them. If a needed lens or page was destroyed, it can be gotten again by returning to where it had been found previously. If you were hit by this bug and you got lots of extra lenses and pages in your inventory NOW is the time to destroy the dupes. This is only temporarily and we do not yet have a known set time as to when this will revert back. This is from the Build 636 patch notes and at the time I write this SHOULD drop later this evening on 7/28/2017.