Same issue here. The first time, I got to the point of being able to set the trap, then the rocks didn't not highlight blue. The other member of my group, who did not place the trap, got the highlighted rocks. I tired logging in and out of my toon as well as in and out of the game. I also tried going to a SH and back (in many different ways; SH to Ship to Ruhnuk; SH to Ruhnuk, Ruhnuk QT to SH to Ship to Ruhnuk; etc). Needless to say, none of these worked for me.
I have reset the mission 5 times now. I am able to get to the point of needing to find the nests however, now the nests don't light up blue for me either. This is very frustrating. Next time I try, I'm going to try to switch to another instance, as someone suggested above. Perhaps that will work for me. After the immense frustration of trying to fix this mission and 5 resets later....I ended up abandoning the mission all together. I'm going to try to see if it works that way or not. Question: Since datacrons are almost always stand alone missions (i.e. no required story progression required, outside of Ossus), does anyone know if that's the case for this one as well? If not, I can drag some other toons there to try. They just don't have all of the extended content finished.
Perhaps hot fix in the 12/20 patch?! That'd be amazing. If not, fingers crossed until then!
Still hoping for a hot fix!