Originally Posted by
Dthngel007
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I somehow got it to (somewhat) work this morning. I was still on my third re-installed version on the Xbox one and had tried everything, including clearing my cache and disconnecting from the internet. I did not realize it initially, but there was one previous save that still had all of my completed missions (since I had done/collected everything except for the main story missions). I switched all of my carried weapons to the ones that were available at the start of the game. The save game loaded where the mission is somewhat in progress (after meeting Sam in his room) when you have to make it to the cenote (where the glitch typically sets in). I fast traveled to the closest location immediately N-NW of the cenote. I walked on foot to the western edge of the mission area (where the storage containers are), which triggered the start of the "stealth" part of the mission. The mission was still significantly glitched to the point that none of the guards saw me, despite walking directly in front of them. I made my way down the entire mission to the boat. I went and killed the soldier to gain his clothes, it faded to black...and for whatever reason, actually progressed to the next scene! I then completed the mission and the game seems to be running fine. No idea which (if any) of the above steps made the difference, but I have now progressed through to the next mission in the game.