Hello!
I was playing with USSEP, Graphics pack and RDO on Xbox, but I saw that people also experienced this bug on PC.
There is a quest that requires 4 resonance gems (also called stones) out of 5 to go into the Kagrumez ruin. There should be 3 reavers, 1 of whom must carry 2 gems but it doesn't spawn, so I can't complete the quest, it's locked. I tried disabling the mods, fast traveling, waiting 30 in game days and so on, but nothing works. Which is a bummer because I wanted to do 100% of the game.
I would be grateful if you could look into it.