Hi, I have been playing through Destiny Lightfall and have completed both 'first contact' and 'under siege'. However, when I try to go to the location of the flag so I can complete 'Downfall' the flag is missing so I cant progress further. Please see YouTube of link that shows where the flag should be, but when I go to that location it's not there. Have I missed something or not don't something I need too? Can anyone please help me with this and I don't know where to go from here. Thanks.