Just did a quick test and it seems to work fine in clean set up. So check the obvious things : Was this worker created and taught in an earlier version? Is the storage full? Did you delete and re-build the storage? Have you tried re-teaching the bot to see if that fixes it?
it looks like it is working now in 7.1 or it comes from space spamming if i need to find the right bot when they are in the same spot.
so as a suggestion, how about ther nametags also show ther tool and if multible bots are at the same spot their Tags will stack ontop of each other so we can clearly see them? i always search long for my wood chopping bot between the trees. ;)
and while my mind is going, how about a locate button underneeth the close button in the teaching screen. if a bot runs away becaus you are not want to stop them right away from work, just want to look into the code - and then you need to search for the bot. that can get messy if he is stoppet under a tree or behind and so on.