WSL doesn't update when Windows file system is updated

Here is my issue:

• I edit a file on Windows, using a Windows file editor.
• I save it to my Documents folder.
• I try to compile the file on WSL using gcc.
• If I saved the file as a new file, I can find it and work with it.
• If I save the file without creating a new file (just using Ctrl+S), WSL doesn't notice the changes. cat file.c shows the old file, and there is no way to update it.

Is there any way to make WSL recognise that the file has been updated, and show the new version?