Wrong import suggestions for relative files #26047

For some unknown reason, I'm getting wrong suggested imports in a certain scenario. I'm working in a mono repo with yarn workspaces. I have a package that depends on another package from the monorepo. The package I'm depending on (package-a) has a export from the main file. In the other package (package-b) I have a file that imports from package-a. But then when I'm trying to do an import from two relative files in package-b I'm getting a wrong import (like shown). But when I remove the import from package-a from the file in package-b I'm getting the correct import suggestion.

TypeScript Version: 3.1.0-dev.20180728

Search Terms:
wrong import suggestion
no relative import suggestion

Code

A link to a github repo with a reproduction

Steps to reproduce:

1. git clone and yarn
2. run yarn build inside packages/package-a
3. open vscode and navigate to packages/package-b/src/another.ts.
4. open the import suggestion for C. Wrong import is shown.
5. Go to file packages/package-b/src/index.ts
6. Comment the first line (the import)
7. Go to file packages/package-b/src/another.ts
8. Open the import suggestion. correct import is shown

Expected behavior:

Suggest import on a file trying to import from another relative file should be:

Actual behavior:

Instead the import is suggested with the name of module and the src folder