Veyon Internet Control addon not blocking traffic through proxy

[IMunro]

We are trialling the internet addon module, and no matter which option we use in configurator, when we try and block internet on a client it correctly blocks traffic directly from the browser, however any traffic which is directed to our (non-transparent) proxy still gets through.

I have tried adding the proxy port into configurator in firewall mode, along with specifying the proxy address. In routing table mode I have tried both options, again specifying the proxy address.

I'm at a loss how to get this to work as we don't have the option at present to switch to transparent proxy.

Can anyone help?