Hey there,
With the recent change to crafting stations so that people can't swipe items out your station I think it's only fitting we extend this to citizen storage.
As it stands, you can steal from citizen storage while someone is access it. This is directly referenced on the rules. This has complications, they might go to access a container like a mining bag but also not be able to place it back (which to my understanding, has happened before.)
But I know zero people who like this state of affairs. It makes little sense when you ask a banker to withdraw something from a bank vault that they'd also attend the stealthed person next to you.
As such, it should have a similar lock.
EDIT:
I massively agree with SK. Please ban fixtures in citizen storage to stop QB placing them in there to make them impossible to recover.