workers bug our when transporting multiple artifacts to archive

so this bugs is very easy to recreate.. basicly you have your archive where you strore your artifacts ready to be researched, now here comes the trick having a bunch of workers transport a bunch of artifacts at the same time
and this is what happens:

they end up running their asses of being marked is working but they arnt doing anything except for running up and down

on a extra note, see how in the movie my battle announcements are like a freaking discoball xD