I'm having several problems with :MerlinLocate which may or may not be related.

Merlin Version: 3.1.0
OCaml Version: 4.07.0
Opam Version: 1.2.2
Operating System: MacOS 10.13.3 (High Sierra)

My project is using dune.

1. :MerlinLocate does not work from inside an installed library (i.e. from files in ~/.opam/system/lib). When I try to use it I just get "Not in environment" errors.
2. When I use :MerlinLocate from a file in my project to jump to an installed library, the first time it jumps successfully. However, when I try to jump again, I instead get a message saying, "Several source files in your path have the same name" with a list of possible matches. I think this has something to do with the existence of these files being cached.