EX4100 - encrypted drives not auto-mounting after shift

My Cloud OS 5 My Cloud EX
1

I had to move an EX4100 unit and had to remove the hard disks which were encrypted and set to auto mount. Disks are set to JBOD and I’ve marked the disks to not mess up the order. On reinserting the disks, while I can mount them manually using encryption password they’re not auto-mounted as before and I’ve to enter the password for all 4 drives at every reboot. Will appreciate any help. Thanks!