Functional Storage Version:1.2.13
Titanium Version:3.8.32
Pretty much the title, there is also one drawer that should be a block out of range that it can access the items of, even though the connection tool does not show it as connected. Breaking and replacing both the controller and the drawer does not fix the issue, though moving the drawer (not changing distance from the controller) does fix it for some reason.
Happy to provide save, logs and modlist. This is going to be annoying to debug as it is in the star technology modpack but it's definitely a functional storage issue.