Thanks, but unfortunately this doesn't work - for my issues at least. I have this (and conntimeout) set to 15 seconds, but it makes no difference. I tried those based on another user reporting the same issue here:

https://forum.rclone.org/t/how-to-get-rclone-mount-to-issue-...

The timeout param is listed as "If a transfer has started but then becomes idle for this long it is considered broken and disconnected". This seems to be only for file transfers in progress.

I traced it once, and Rclone gets a "temporary DNS failure" error once the network is down, but just keeps retrying.