Factorio Forums

Empty filtered inventory slots have a tooltip of the item type they are, but a filtered inventory slot has no properties itself.

I believe this is a usability bug as the tooltip is inaccurate. Ideally, the tooltip would state that the inventory slot is reserved for the specified item.
This arose as a new player asked on a stream after thinking an empty filtered inventory slot was a usable item that they couldn't use/move based on the tooltip it presented.

Generally we show the properties of items even if they are not real.
But since I saw this confusion a few times, I made this case clearer by showing "inventory filter" instead of the properties, only for inventory filters.

Not a bug, but resolved in Version: 0.17.63.