ill just be walking along in zion and ill pick up an unshaded triangle and as i go to follow it, it disappears on me.
im wondering if anyone else is having this problem because its actually annoying and if anyone else has had it maybe youll know how to fix it
ive tried leaving zion and reseting my xbox but nothing

Yea I have the same problem. Happens in the main map as well. I couldn't figure out what was up.

by main map i assume you mean the mojave?
and ive never had this problem in the mojave i found everything without a problem

Are you guys completing your quests? I think it disappears after each quest an you have to select a new one.

Yeah, I had a ton of trouble finding the Survivalist's Rifle because the marker for The Red Bridge wouldn't appear.

i had the same issue. i had to have someone describe to me where it was lol

I have yes, it's rather annoying but whatever. It's a obsidian game so there will be bugs, though overall I found the map bugs and intense lag the only technical problems with the dlc.

I'm not having that problem, the problem I'm having is enemies inside of rocks and mountains.
Also I find that occasionally shooting someone or something doesn't register as a hit.
And I'm having that one glitch where your character in 1st person pov holds the gun way up in the air sticking his arms out...It's happening more ofter than usual.

The Arie was hidden for me as well I should say.

i had to re open a save file and level up for the explorer perk take a pic and go off that on my main file.
the aeriel a couple of bridges the spine catterpillar mount (i think is what its called) the red gate burial moundand sun sentinals all did not show up
as for the arm glitch where your arms jump off the top of the screen and slowly move down and enemys stuck underground thats been happening since new vegas released.

Same. This is a fequent problem with lots of the little ticks on the compass.

If anyone is reading this and can help, there is a map marker just northeast of Three Marys Cavern that I cannot lock onto. It's impossible. It's like it's in the middle of the mountain range.

It's probably just another glitch, if you are down the trail from the fishing lodge it says there is another location but when you get near the lodge it suddenly disappears.

I have had all of these issues but I think I may have a unique case here, durring a couple of the quests the quest markers would either point to the place were I got the quest or not show up at all. Sometime they would and durring my travel towards my destination they would disapear along with the undiscovered locations in the area. Made the DLC a good bit tougher and I was up to the challenge but it sure was damn annoying. And luckly a white leg enemy I killed randomly had the survivalists rifle, I did not understand it was unique untill I got on here.

I am currently trying to find all of the cave that old guy was living in but well you know.

yeah, ive had this, and its really funny cuz u fallow it for like an hour (i think it appears randomly) and then eventually it disappears... and ur so mad that u talk to yourself for like a second, then u see anuther 1 nd completely forget about the 1st 1 until u read about some1 else who had the same problem.

Have the same problem as well as explorer perk is only showing abouut a third of the undiscovered locations. This had mislead me to thinking I had discovered them all once I went to those few, only to see new location markers on my HUD that would annoyingly go away once I started to try and find the locations.