I am also stuck on step 6. Nothing I do will spawn the puzzle in the heart room. The number pads do not appear. I have loaded in alone, with a fireteam, with a fireteam who hadn’t done the quest yet, etc. I’ve wiped after completing the brig encounter to try and spawn them manually. I’ve collected the next two messages at this point hoping it would unbug the first puzzle but it didn’t. I saw that some were lucky enough to have the tablet spawn in and they can interact with it to progress the step, even if the puzzle doesn’t spawn. Unfortunately, that is not the case for me. I even tried to reset the quest and start over from the beginning but I can’t do that on my end. It’s a little frustrating the next dungeon is gonna release and I haven’t even gotten to use this dungeons exotic because the catalyst quest is still bugged. Just collecting dust in the vault 😔