I want to spread the word on a possible fix. Ive tested it as I was struggling to get the last 2 fragments due to have 20 Memories of Light and it not converting to a legendary version. Vestige of Light is Bugged. Ive been up super late trying to get the fix for this. This is all the stuff I found out so far to solve it. Okay, here we go: Basics on How to get Memories of Light: 1. Grab a "Alone in the Dark" quest from Micah-10 2. Do all steps till it sends you to a CYST location, will be marked if you mark the quest. It will ask you to invert and point the marker on a bird, do the invert and follow the marker to the cyst. 3. When you enter (depending on which cyst, might have to go further), there will be enemies along the path glowing. Kill the glowing enemies and you'll receive a Memory of Light (Blue). Continue till you get 5. It will then convert to legendary (purple). Do NOT continue, just fast travel to area that has the circle for the Memory: (insert 1 of 3 names here) and find the chest to receive prismatic fragment. Now, heres where the bug comes in. Most players have a lot of these or cannot spawn these up after receiving 1 of the 3 chests. Heres the fix I discovered. - IF YOU HAVE 10 OR HOWEVER MANY MORE MEMORIES OF LIGHT (BLUE), DELETE THEM, EVEN THE MEMORIES OF DARKNESS ONES AS WELL, JUST TO MAKE SURE. FOLLOW STEPS BELOW: - IF YOU COMPLETED A CHEST AND CANT SPAWN ANYMORE. FOLLOW BELOW AS WELL: [b][u]1. LEAVE THE PLANET/DESTINATION, JUST GO TO ORBIT OR TOWER, SOMETHING.[/b] [b]2. TRAVEL BACK TO THE LOST CITY AND GRAB A "ALONE IN THE DARK" QUEST. COMPLETE QUEST UP TO STEP 5 OF 7 (CYST EXPRESSED) 3. DO CYST LOCATION LIKE QUEST IS INDICATING, ONCE 5 MEMORIES OF LIGHT DROP ALONG THE WAY. DELETE OR COMPLETE "ALONE IN THE DARK QUEST". 4. GO TO CHEST AND UNLOCK FRAGMENT. 5. RINSE AND REPEAT STEP 1. MAKE SURE TO DELETE/COMPLETE QUEST "ALONE IN THE DARK" AND PICK UP AGAIN FROM STEP 2. [/b][/u] NOTE: Ive looked everywhere for answers and no one had real solutions. This is the closest detailed solution Ive seen as it worked for me and my buddies when I was testing fixes. Hopefully this helped.