look at the picture of the proxy settings here
https://support.tixati.com/settings%20-%20network%20-%20proxy
you see at the bottom of the settings box, where it says IMPORTANT: in all caps like that
make sure you read and understand that part ... you must disable UDP when using proxy, it takes 2 seconds
proxys are not so great anyways, sometimes they log each connection src-dst, so not good for hiding so much
use a VPN, that's the standard way to do it these days
by the way, i just test to make sure, and when the proxy fails it says things like "proxy timed out" and other errors... does not keep going.