It also seems to be an issue with newer GZDoom; Kagen didn't have issues with the SPC playback in earlier builds and I can confirm that as well sadly after install another v3.4.1 installation of GZDoom and it didn't happen there, unfortunately I can't use other newer mods like Tactical Spy (which crashes the engine despite saying it works with v3.2 or newer) and updated builds of RetroShader with GMOTA.