Goto defintion goes to module only not function or binding

In a current project when using reprocessing, the plugin fails to go to the specific module function eg `Draw.fill(..)` instead just goes to the Draw module.
This is also the same in inbuilt modules

eg `Array.make_matrix` only goes to array.mli

(Sorry if this is a known limitation rather than a bug. )

Repo here
https://github.com/yunti/reason-twenty48

Reproduce the issue in the linked reason-twenty48 project using go-to-definition on Draw.fill and Array.make_matrix. Trace the language server's go-to-definition handling for module functions and bindings; done means each reference opens the specific function or binding declaration rather than only the module interface.

Written by the indexing model from the issue text.