Starting with the release of the Final Shape, any time i am playing in an instance that has multiple guardians present, both myself and all guardians present will continue not to load in. Rendering our characters and weapons invisible. For most PvE activities this is a mild inconvenience, not being able to see or hear my weapons and abilities, or even a reticle to see where to aim. This has also made PvP entirely unplayable. Went 4 games in a row and only had 3 people through all of them load in so i could see them at all.
Playing on an Xbox One S and this has been an issue in the past sporadically, but it has never persisted this long after an update.