Not sure if this is a bug or not, especially since I like it.  Anyway, once I colonize a planet, I get the "sensors indicate blah blah blah".  I personally like this, and if it is a bug, I hope you don't kill it.  
I know some people were saying they would know which artifact it is and get the artifact prior to exploring - this would be a bug; I have not had that problem.
[EDIT:]  No, I am not joking.  As the artifact system stands in v1.05, my money is better spent in research.  The one exception is if I found the data archive artifact.  The rest of them I can pretty much get with research at far less cost.  However, if I at least know SOMETHING is there, then I might take the risk and see what I get.  It would even be nice if the scouts would tell you which planets have something "unknown" on them.  That would give another dimension to how you choose to expand.  I know a lot of people will disagree with me, but I think the artifact system is broken in v1.05.