I was in a hjouse and found a can of spagetti inside in a corner, then i opened a can of tuna and ate that.
I threw the empty tuna can away and put the spagetti can in my inventory. Then when I was gonna leave i could not get my knife with me.
It had glitched through and under the floor and I could not use the "Take Kitchen knife in hands"action. I could see it in the inventory "vicinity tab".

So I lost the knife.