The deepsight chests needed to progress this triumph for the seal are currently not counting towards it. I tested all of the deepsight chests and only one counts towards it, and it's complete chance if you load in and the deepsight is even there for you to interact with. I'm assuming this happened post nerf of everyone farming those, but for those of us that didn't and didn't complete that triumph, we're kinda SOL at the moment. Unless anyone knows of a way to actually get it to progress consistently right now?