I have same issue with unstable jackd2, where server exits when client stops sending.
Workaround is to start a second client and pause it so jackd does not exit, eg 'mpv some.mp3' pause with space bar. be well, Chris -- Chris Miller * 208 Portland Road, Gray, ME 04039 * c...@dryki.net "If one just worships Govinda, one can easily cross this great ocean of birth and death" - "Bhaja Govindam", Adi Sankara