Tixati stops transmitting data when I turn on my WindScribe VPN. This has just started in the last couple of days. VPN continues to transfer data from other websites. I have made no changes in either program.

what OS and what version of tixati?
are you sure tixati is set up to go through your VPN?
do you get any errors?
has your VPN updated anything?

Do you have Tixati locked to a particular ethernet interface and somehow it was changed during an update that is not longer going through the VPN?

Maybe you know this, or maybe you don't.

Is your VPN client connected to a P2P server of that VPN service? Some VPN services disconnect you if you are on a non-P2P server of that particular VPN service. This mostly happens with FREE plan/versions of a VPN service. Is your windscribe premium or free?

I have ProtonVPN and I used the free version for a day and it disconnected automatically because the free servers don't allow P2P. And when I upgraded to premium plans, I selected a P2P server from the list of servers in that protonvpn app and my torrents worked fine.