TypeScript code completion not working well

I'm not sure when exactly this started happening to me, but it's confusing.

I'm working on a project in TypeScript and I realize that the code completion doesn't work well.
For example when defining a type for a variable the only suggested options are of types defined in the file or in referenced files, there's nothing from standard types, such as what's defined in lib.d.ts.

I have another project and there everything works as expected, but I can't understand what's the difference between them, and I can't find anything in the settings which has anything to do with it.

Any ideas?
Thanks!