Unable to start pulsemeeter - JSON stray \ before #

[Corfiot]

Describe the bug
Pulsemeeter fails to start when exited once.

To Reproduce
Steps to reproduce the behavior:
Start pulsemeeter - shows no applications at all, ever
playback on firefox
close pulsemeeter
try to run it again
Errors: ERROR: invalid json grep: warning: stray \ before #
invalid json from server
App sinks returned an error, audio backend probably crashed. Server will be closed.

Expected behavior
the thing to start up again and show me applications

Screenshots

Desktop (please complete the following information):
OS: Linux-5.15.76-1-MANJARO-x86_64-with-glibc2.36
Python version: 3.10.8 (main, Oct 13 2022, 21:13:48) [GCC 12.2.0]

Additional context
could be relevant to the "#" in json from pulseaudio issue?
What is that "%" at the end of pmctl list sinks?

[Seraphli]

same issue here