Google Drive upload slow on Windows, normal in Linux

To sum it up, for some reason my upload to Google Drive using Rclone is very slow on Windows.
If you take a look at the difference at uploading the same file from my Linux and Windows computers:
Windows
https://github.com/ncw/rclone/files/922903/log-windows.txt
Linux
https://github.com/ncw/rclone/files/922904/log-linux.txt
The upload is MUCH slower on Windows. While the upload on Linux stays consistent, Windows suddenly goes to crawl’s speed. Both use my own Drive api and are fully identical in how they’re set up. Using the web upload on Google Drive works fine on Windows, by the way.
Would anyone know how to fix this?

I have Google Fiber and had an issue with Google Drive being slow on my Windows machine until I unbinded IPv6. See if it helps for you:

https://productforums.google.com/forum/#!topic/fiber/XZWct_ofOJ0

https://support.microsoft.com/en-us/help/929852/how-to-disable-ipv6-or-its-components-in-windows

I’m afraid that I don’t think that’s the case.
Firstly, my Linux is also using IPv6. This is because, I couldn’t even connect if I didn’t have it enabled. This is thanks to the fact that my router is actually a 4g sim card connected to a router. The 4g network that I’m connected to forces us to use IPv6, and due to that if I even try to disable IPv6 on my machine I can’t connect to the internet.
Secondly, if you take a look at the Google forum link you posted, a Google employee said that the issue has been fixed.