Edited by rockpicken: 12/15/2020 10:27:16 PMI'm stuck at 8/9 as well, and have looked all over for solutions. I can't imagine having to go through yet AGAIN to each location and shoot at the air. Clearly a bug in the ointment. I shot 6 originally for the first part of that quest, so only had three to go. So maybe that one extra is what got me.
You may need to revisit all the Entropic Shards and "destroy" the area where they are supposed to be in order for the quest to register completion.