The Crucible 120Hz toggle seems to have been accidentally replaced with a defunct, duplicate HDR option. If left alone while having been previously enabled, the 120Hz function seems to work as intended, properly swapping to the higher refresh rate when loading into Crucible games, and then swapping back down to lower refresh rate for non-Crucible modes. However, if the new "HDR" setting is messed with and "applied", you seemingly cannot revert back.
-
Same, but 120hz doesnt work now in pvp.