After reading a question on ST probes, I was reminded of the Voyager episode "Course: Oblivion" where
A probe which was constructed out of non-affected materials is prepared for launch by Seven of Nine, but at the last minute, the launcher malfunctions and the probe becomes lodged.
However, after the duplicated ship and crew fully revert and begin to dissipate, the real voyager crew, on investigating the distress signal sent earlier, notice the debris field and scan it, finding only the base molecules of the silver blood, the substance that duplicated the crew.
So my question is, why did the real Voyager crew not find the probe and other non-affected materials?