When sliding a single type of filter ie. sponge filter, while having two in your inventory, all of them will disappear.

[SobieskiCodes]

Do we need to care if items slid over eat "multiple" if the goal is to only the user to have one "type" of that item at a time in the long run? do we have potential for bug abuse? do we need to look into this? it's not hard to fix, we just give each item an index and only remove that item (in fact it should already have in index.)

[SobieskiCodes]

This only happens when you aren't swapping.