Input output pipes:

Import a filter with the button from a container

Add another item to another slot. Observe it vanish, but its still there

It comes back if you close and reopen, OR it comes back if you interact with any button

I fixed this in cyclic, may port it over later

I think it only happens after a filter import not sure. Still learning how these ghost slots work, havent touched them since the fork. Will either need some careful fine tuning or a total rewrite

For now just a little visual issue.