LiveAudioMixer in membrane_audio_mix_plugin raises, when input pad id is a reference

[FelonEkonom]

stacktrace:

20:05:56.275 [error] <0.1543.0>/{:endpoint, "recorder"}/:mixer Error occured in Membrane Element:
%Protocol.UndefinedError{
  protocol: String.Chars,
  value: #Reference<0.2482563602.4096262146.236672>,
  description: ""
}
    (elixir 1.15.6) lib/string/chars.ex:3: String.Chars.impl_for!/1
    (elixir 1.15.6) lib/string/chars.ex:22: String.Chars.to_string/1
    (membrane_audio_mix_plugin 0.16.1) lib/membrane_live_audio_mixer/live_queue.ex:57: Membrane.LiveAudioMixer.LiveQueue.remove_queue/2
    (membrane_audio_mix_plugin 0.16.1) lib/membrane_live_audio_mixer.ex:221: Membrane.LiveAudioMixer.handle_end_of_stream/3
    (membrane_core 1.1.0) lib/membrane/core/callback_handler.ex:139: Membrane.Core.CallbackHandler.exec_callback/4
    (membrane_core 1.1.0) lib/membrane/core/callback_handler.ex:69: Membrane.Core.CallbackHandler.exec_and_handle_callback/5
    (membrane_core 1.1.0) lib/membrane/core/element/event_controller.ex:131: Membrane.Core.Element.EventController.exec_handle_event/4
    (membrane_core 1.1.0) lib/membrane/core/element.ex:243: Membrane.Core.Element.handle_info/2
    (stdlib 5.1.1) gen_server.erl:1077: :gen_server.try_handle_info/3
    (stdlib 5.1.1) gen_server.erl:1165: :gen_server.handle_msg/6
    (stdlib 5.1.1) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
24 czerwca 2024

TODO: add one inspect/1 in the line that raises