As confirmed by multiple users, this issue is fixed in latest version of InDesign.
Thanks for your feedback.
An error occurred while saving the commentYulia Semenova commented
Just updated to 15.0.3 but the problem is still here. Instead of collecting cashe font files in a random folder they are now saved within their designated Fonts folder, BUT they keep sync with Google Drive every time I open an Indesign file and it slows down Indesign a lot! Please fix it! It was fine before the 15.0.2 version.