Hi, thanks for the bug report!
I'm not entirely sure what you mean, though. I also haven't really played with Factorissimo in a while. Can you elaborate what you did, what happened and what you expected to happen?
What I've tried to reproduce it: Placed a Factorissimo building, went inside, placed some logistic chests. Without a filter, they show the warning icon (as expected). Using the acknowledge tool on them works just like outside (warning icon replaced with green icon). So I assume you probably mean something different? Or is this not working on your side for some reason?