O man, I completely missed the second stacks!!! Thanks for checking into it, sorry about the false report.

Unfortunately I couldn't quickly replicate it in the editor. If you load up the attached save and ctrl+left click to move the quality or productivity modules (rare, tier 2) to the tank from the player inventory you should see the module appear in both the tank main inventory and the trash slots. The ...

I took some modules from a tank for building on fulgora. When I was done I entered the tank and tried to place the modules back in the tank inventory. The module appeared in both the tank inventory and the logistics trash. I could then remove the trashed modules and repeat to increase the amount in ...