See reddit link here for other firsthand accounts https://www.reddit.com/r/DestinyTheGame/comments/wygvdu/all_deepsight_nodes_bugged/ Basically, all Deepsight nodes in the throne world are completely broken. They are both invisible, and automatically give you deepsight without activating, and then the buff just vanishes randomly. Can't get progress for the seal or any triumph, because I can't find any deepsight nodes. I'm not running around hoping to find one, only for it then not to work properly anyway. According to reddit link this has been happening for a month now, no mention in the known issues list. Come on Bungie, this is a core feature of the throne world.
Can confirm ALL deepsight nodes are bugged. They randomly activate and are invisible. I tried to do a triumph the one in quagmire by the caves and it just activates when im near the area and displays a single rune then disappears with the buff. Absolutely broken.