I finished and crafted the Exotic Glaive on my Titan, and then got the pattern to drop from wellspring on my Warlock, but on step 4 of 11 when you have to place the osmic fragment in the cauldron in the Queen's Bailey, the Caldron does not spawn. I tried a few different things which didn't work 1: going back to the Enclave to craft the glaive 2: checking postmaster 3: checking abandoned quests 4: playing with a player on the same step. It marked the caldron when tracking the quest, and let me hold square to place the osmic fragment, but after holding down so the white circle fills, the square prompt appears again. After completing the remaining steps on the throne world, The other player made me fireteam leader and I tried it again, and then he left the fireteam and the caldron despawned. I was thinking about abandoning the quest and picking it up again from quest kiosk, but I didn't want to risking losing the quest altogether.