Mac Catalina. ALK often drops audio of a track when plugins inserted - no matter which Format. Sometimes it mutes a track at once when inserting a plugin, sometimes it mutes after a bar. Sometimes it happens when dragging an EQ curve and the sound is changed… I cannot figure out the system behind that… examples: TDR Kotelnikov, Sonible Smart EQ, Surfer EQ, Toneboosters Equalizer V4, V3 and many more.
Some plugins will produce sound only in Left ear in au version, but work in vst etc… f.e. Kickstart.
Plugin management is one of the weakest points in ALK.
Hope the update will fix it…