Cloudflare Websockets not working with VPN?

Question

VPN

If I have VPN enabled, then websockets do not work *writes the following error:

Failed to load resource: net::ERR_TUNNEL_CONNECTION_FAILED

Everything works fine without a VPN.

nginx server, lib for sockets - socket.io

Has anyone come across? Could it be a VPN issue?

UPD: as I noticed, VPN sockets DO NOT WORK not only on my site, but also on some others

Answer 1

https://www.linux.org.ru/forum/talks/15503795
I think you have the same VPN,
the real VPN is not visible, or rather, it is visible only with a reduced speed