Auto complete not working for packages except those under @types folder #30474

• VSCode Version: 1.30.2
• OS Version: macOS v10.13.6

Auto complete is one of my favorite features of VS code. But sometimes it doesn't provide what I need.

Steps to Reproduce:

1. Create a project with create-react-app: npx create-react-app test-auto-complete --typescript
2. Create a empty file src/test.tsx.
3. Make sure auto complete works: type isvalid and get following suggestions
   
   Then confirm:
   
4. Install a typed package from npm. (I made one - safe-touch
5. See if auto complete works for the package(type safe and expect suggestion of safeTouch):
   
   Negative :(
6. There is a difference between the types file of safe-touch and react. Safe-touch's is directly under node_modules while react's is under node_modules/@types/. Then I tried to make a folder under @types for the package, simply cp -r node_modules/safe-touch node_modules/@types.
7. See if auto complete works now:
   
   It works! 🎉🎉

So it seems that VS code is not able to auto complete types of node_modules/[package] even if the package is correctly typed?

Does this issue occur when all extensions are disabled?: Yes/No
No