Buried Supplies quest can fail on activation without previously modifying the terrain below.
It happened to me with a tier 2 buried supplies quest in the burnt forest, it was an area previously unexplored, but I noticed that the exclamation point was a little elevated from the ground aside from the bouncing. ( on top of a rock maybe? IDK.
That's a weird one, but it never happened to me before.
The area was fully loaded on the RAM and also I did not experience any graphical glitches.
A POI was close, not too close though, (15-30 meters maybe?).
I will post new information regarding the issue if I ever encounter it again.
I do know I can force a fail by digging up all the area, but this one I've never encounter.
Edit: the terrain was kind of flat, but I could post screenshots with the location and seed If needed.