Question: Exporting audio from multiple outputs instrument

[UnionS8]

Hi!
I would like to export a beat made by multiple outputs instrument. Drum by drum. I have created a rack, copied it to the corresponding tracks, nested in a submix track. OK. Everything plays fine. But when I try to export an audio from these tracks (one by one), there's a sound only in the track with MIDI clips. Have I create linked clips through the whole song into these tracks too? Or is there any workaround how to feed all tracks with just one MIDI clip?
Thank you.