After upgrading VS Code version to 1.32.1 automatic hot reloading is not triggered by saving / auto saving. It worked like a charm before.
Hot reloading still works
Edit: This issue has been fixed in VS Code 1.32.2 which is now live.
VS Code 1.32 has a nasty regression that's throwing errors during the debug session launch that's stopping a few things from working.
I would recommend temporarily downgrading to VS Code 1.31 (there are download links at the top of the v1.31 release notes) until the fix is released.
As of Saturday 9th March the fix is in master, it should appear in the Insiders build on Mon 11th March and is planned for a recovery release. I hope it won't take too long to release, it is tagged as important in the issue tracker (I'm not on the VS Code team though!).
Relevant issues: