I just noticed this. Properties seem to appear on instances that do not have said properties. I am pretty sure i have seen this before, but i finally got to record it.
Fixes: restarting studio
Issue area: Studio, properties
Issue type: Properties displaying where they shouldn’t
Impact: small, harder to navigate
Frequency: random, actually kinda hard to reproduce
I noticed this last night as well.
The first couple of times clicking on other items fixed it, but since it was problematic I did the same as you and restarted Studio to fix it.
Do they correspond to objects you had previously selected? What happens when you change them? There seems to be issues with the selection in studio lately.
There’s still similar bug with properties to this.
After you stop play testing the object in properties you selected before will deselect in explorer but will remain in properties, causing it to remain after selecting and deselecting anything. (properties also become invisible when you select something else)
There is another related post and is most likely about the same issue. Properties panel shows "phantom selection". A fix has been released and please let us know if there is still an issue.