So I was casually doing mission 44 the mfinda oilfield. I had the stealth camo on, infinity bandana, stealth suit, UN-ARC-NL stun rifle, brennan lrs-46, AM D114LB-9 pistol, rocket arm, active decoy hand grenade, flare supply, e-stun decoy, magazine, nvg, c.box (smk) with D-dog, wormhole fulton, and my own APE T-41LV jeep for my loadout. This was all at night time btw. So i started by running into the town while marking some guys and then went to do the mission task of extracting the kids so i shot all of them in the face with the stun rifle and the guy next to them and extracted the kids. The guards went on alert, then i took the random jeep at the top of the hill after killing the two soldiers who patrol between outposts with the sniper, then i drove the car around the right side of the outpost so i didnt get caught while having the camo still active, i drove into a telephone pole as i was making my way back into the middle of the road to head towards the burned village for the vulture mission task when the camera started panning super fast from my location to the cutscene of me pushing the button on the control pump thing at mfinda oilfield. I watched the whole cutscene play out because i didnt know what the fuck was going on, after it was over i was like wtf and then i was prompted to push the button on the pump where i was teleported to. So i did but then nothing seemed to happen other than the sound of it turning off, the cutscene didnt play again, at this point the yellow mission target marker thing is gone and there are a bunch of guards all around the oilfield patrolling like usual, i put the camo on and put the c4 on the oil tank, ocelot said his line then i left the oil feild to go get the vulture. As i left, the mission marker updated and showed up again, i got a checkpoint, and miller said "thats the oilfield" as if i never went there, then i got the vulture, went to where my car was with d-dog who was still sitting in it and started experimenting. I got in the car and then out and d-dog would start to jump out but then just teleport back to his sitting position in the car, i also tried diving out of it too, so he's permanently stuck sitting in the car, i thought about flipping it but didnt end up trying it. He can still spot things though as i drove by he spotted animals and guards as i pulled up to the oil field, i then blew up the tanker while i was in the oil field and then the cutscene played after it ended d-dog got out of the car and everything seemed to be back to normal. I figured it might work on mission 13 as well. Sorry for the shitty grammar, I just wrote everything down really fast so i didnt forget anything. I don't know if it's relevant, but I had just finished the extreme code talker mission before starting this one I believe.
This is a known warp glitch, and it's not inventory based (I believe) as Pykn was able to do it back when he was doing New Game FOXHOUND attempts. If you could get a video of it that would be great, because if we could replicate it, it would save time in NG First Ending FOXHOUND and First Ending Any%
So I haven't replicated it yet, but I think it has to do with a checkpoint you get where it happened at.
This glitch has been known for a long time but nobody knows how to do it sadly. But at least this confirms it's still possible on the most recent patch (assuming you're playing on that) so that's good information.
I dunno if this has been found in the mean time, but I've been able to reliably reproduce this glitch. Simply run to the location in the middle of the oily marsh in the middle of the map shown here:
I'm not even a speedrunner myself, but I've been watching runs and recalled this glitch and was amazed when it happened to me. Since that location looks pretty close to the center of the mission area, my suspicion is a scripting or map editor bug also allows the cutscene to trigger from that location.
