I could see someone being frustrated that from a third party, it looks like you are not responding to a reply and that person could spin that as a concession that they were right
I could see a compromise, where a direct reply from such a blocked/muted person is allowed, but indicated so that people are aware a response could not have been done.
Blocking someone is not a tool to silence them. It’s a tool to ignore them.
I could see someone being frustrated that from a third party, it looks like you are not responding to a reply and that person could spin that as a concession that they were right
I could see a compromise, where a direct reply from such a blocked/muted person is allowed, but indicated so that people are aware a response could not have been done.