Signal stopped working in Russia even with the "bypass censorship" option

Is this a ban on default servers’ connectivity, or a protocol-wide ban? Because if it is the former, Russian users could pass a list of self-hosted SMP and XFTP servers that they can manually put in, rotate and use as necessary, no?

Granted, would be ‘cumbersome’ and not an out-the-box experience, but it certainly is a workaround, along with the SOCKS proxy support in latest beta release.