Sometimes, when building (I only saw this when building blueprints) the memory unit just doesn't work, i.e. you can fill it up but it never "takes in" items. Removing and building it again usually fixes this.

Also, when blueprinting, the signals get "frozen", so when building the blueprint, the circuit signal still shows the items from the time it was blueprinted even if the unit is empty.

I've seen this with manually placing them, too. About 1 in 20 will come up in "dumb chest mode".

Both of these have been fixed

Thanks for the report

I confirm the fix. Was about to open a bug on this topic last night but I was too tired, so I updated today and everything looks fine.