Windows - mount becomes unavailable when uploading

If you saturate the upload then it will block ACK packets for the download.

However it sounds like this isn’t the problem you are seeing.

I think you are seeing the same problem as here

I’ve warmed up the potential fix here - can you give it a go?

https://beta.rclone.org/branch/v1.46.0-110-g518d096f-vfs-async-release-beta/ (uploaded in 15-30 mins)