Not sure this is a bug, but not sure should be happening.
My survey ship hit a wormhole (or black hole, forgot what they're called) and ended up in an unexplored area outside its range. The ship plotted a path to a nearby artifact, picked it up and then plotted to an artifact back in the middle of my explored territory. I suppose the first artifact could have been along the path home, but...
Seems like if a ship, even survey ships, finding them outside their range area should immediately plot a path back to the nearest hex and do nothing else until they've reached it.
--David