If network interface connection drops while using proxy torrent still downloads

[ghost]

qBittorrent version and Operating System:

v3.3.12 & Windows 10

What is the problem:

When a network interface (VPN interface) is specified and a proxy is also being used, if the connection through the network interface drops then torrents have a huge speed drop and appear to lose connection but then continue to download and speeds returns to normal.

If there is no proxy being used then once the connection through the specified interface drops, torrents will stop downloading.

What is the expected behavior:

Once the network interface connection is lost, all traffic will stop.

Steps to reproduce:

Specify network interface and setup proxy.
Disconnect the network interface while downloading.
Torrents should see a speed drop looking like a disconnection, but then the speed increases back to normal.

[ghost]

I have seen this on windows 10 before, I recommend using the windows firewall to block private and domain inputs and outputs for qbittorrent.exe. This will only work if your main network is set as "private" aka. there is a homegroup. When you connect to your vpn network, it will be public and the application will only be allowed to have incoming and outgoing connection while the vpn is active. This one has been the most reliable fix for me.

[Seeker2]

Seems related to:
#5272 qBt traffic escapes allowed interface

[FranciscoPombal]

This issue has been closed and locked for being too old, and thus either most likely resolved in recent versions or no longer applicable.
If you experience the reported problem or similar in the latest version, please open a new issue report with the requested information in the issue template.

A new issue report with relevant updated data gathered from the latest version is preferable to necroing an old report with a comment like "still happens in version x.y.z", even if you think the bug is the same, or suspect of a regression. Due to the changes made to the qBittorrent code and its dependencies over time, the exact cause of your problem could be totally different than the original one, despite the visible symptoms of the bug being similar. Thus, providing relevant updated information is crucial to find and fix the root cause of a recurrent problem or regression.

Thank you for your contributions.