You don't need glitches to get out of the underground chasm's intended areas, there's a very accessible hole in the roof of one of the mining areas. Just look up "chasm out of bounds" and there should be vids on how to get through it.
@@xdnt4967 in the cave called "flamegranate tree roots: geothermal surge" by the map, in the northernmost path next to the liquid phlogiston, a yumkasaurus indwelling spot and two flamegranates, look at the ceiling and you should see a sort of platform from which you'll be able to spot the hole