This is my 3rd solo flawless attempt in a row where in the cube room after putting the mote into the light/darkness and standing on the middle plate it would rise me up to the ceiling.. but not actually teleport me to the next room. So I'm essentially softlocked and have to go back to orbit as there's no way to progress. I waited for 15 minutes seeing if maybe any knights or hobgoblins would spawn but no, it's just locked there's nothing you can do. Please look into this asap as it's literally gamebreaking. Multiple videos on YouTube showcasing this as well.
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Bungie is investigating this issue.