[Jack-Devel] Jack server keeps playing sound after client disconnetcs

After the user hits Ctrl-C on the client, jackd keeps playing some sound it got from this client. Only jackd restart helps. Why doesn't the server clear the buffer when client disconnects? What part of code is responsible for cleaning up after a disconnected client? Problem is observed on the FreeBSD 11.1 with jack-0.125.0 Yuri