When selecting the option "Auxilium" ---> "Enable auto-mounting of camouflage" there are some tanks it will never work for, such as my Lowe, my Lorraine arty or My BatChat 12t. No matter what camouflage I choose for them, as soon as I switch to a different tank in my garage, the camo is removed and never reapplied.
Antivirus was disabled during installation.
As an extra, I tried to uninstall Aslain pack and install only ShuraBB mod since I wasn't sure who to report the bug to, if ShuraBB or you. His mod appears to work without any issues at all, hopefully this extra info will help you find the bug!