The timed puzzles for shooting symbols are bugged. They appear, and regardless of if you start shooting them or not, they will all despawn almost immediately. You might get 2 or 3. This happens for most that I've encountered, except maybe two, or perhaps I was just super speedy and it's all of them? Deepsight also "automatically" triggers, you don't activate the nodes - may have missed this being implemented in the past?