/mnt doesn't remain as a mount point after changing processing disk

What version of plexguide?

v8.7.5

What Operating System?

Ubuntu 16.04

What is the problem?

Want to use a secondary drive as processing directory. Made change via PG Tools > Change Processing Directory. After rebuilding containers, all applications now see second drive as a mount point, but no longer see /mnt (where all of my media is hosted via google drive).

This wasn’t an issue until I had to replace my system drive and rebuild.

What did you already try to solve it?

Redeployed PG Clone. Switched processing disk back and forth from /raid (my secondary disk) to /mnt.