First let me say I did search this using two different wordings & found nothing that fit. If I missed it as already reported or as a known issue please forgive my goal is to help make the game better not muck-up the forums.
Lets get to it. On Xbox with the XB1 Elite console, Streaming native to Mixer, Hosting with two players. At the 7hr 27min point of the stream (link below) we ran into a bit of lag issues, my friend was ready to go & wanted to make sure the game was saved, We opened the map to find a close safe house to find that there was no fast travel option (mid-mission). So, we completed the mission then looked again to fast travel & again the option was not there. We ran to the safe house it saved then looked & fast travel was there again.
Hope this information helps & again sorry if I missed a previous report of this.