Mission Brought to light on Voeld, perma bugs if you die.

Generally speaking. Unless you have loaded a game prior to this happening or starting a new game you can not know if it was fixed by a later patch as for you what caused it already happened. A patch can not make it undone but can make it so that an issue doesn't happen anymore.

I don't know if your issue was fixed or not. Just trying to explain how a patch works.