Researching the drives SMART reports, I have found there's no issues there. I have not been able to find any other post with a similar problem to mine. Shutting down the system though the GUI while a scrub is happening seems to destroy GELI encrypted drives. At this point im not sure what else i can do.
I have tried Klennet without success because 8 of the 12 drives would not unlock. Although only 5 drives wont unlock through TrueNAS. I'm going to continue to update this as I make attempts to recover.