With the split elevator mode active, the RandoMapMod indicates that I can go down the right elevator with desolate dive even though it's locked. I seem to have exhausted all my checks elsewhere so presumably the logic also thinks I can go this way.
Here is a screenshot of my map tracker indicating I can reach under Xero and east City of Tears: https://i.imgur.com/Pv1Gejy.jpeg
And here is a screenshot of my inventory: https://i.imgur.com/noAyhcl.jpeg
Here is my settings file: settings.txt