I just finished the dungeon for the 1st time in this week and the 1st petrol chest in the wasteland (the desert area) did not respond. But the 2nd one in singularity (the rollercoasters) showed up. Should I try and played again?
Interesting. Are you sure you were in the right spot?
Probably would have to run it again to get the chest. Just a note those chests only drop loot you’ve already acquired, so it being your first clear it would have had a second of whatever your first encounter drop was.