When mixing, i like to have the song playing while i add inserts and sends. but everytime you add these, the audio drops out and comers back in. This feels like the DAW is glitching out.
Whenever adding inserts or sends, have the audio be bypassed and fade it in after the plugin/send is fully initialized. (this is just a suggestion of course)
Could maybe improve the audio engine or something to make this more smooth.