drummer unexpectedly mutes when recording audio

things  you need to reproduce this:

- 1 audio track

- 1 inst track

- 1 drumemr track

it's not reproducible without the instrument track (to my experience).

Expected logic behaviour:

Logic automatically record arms last selected Soft Inst track. You need to disable it manually (by clicking R on the track header or ch. strip)

Unexpected behaviour:

However, when there's a drummer track, you can't press R. Logic still interprets the drummer track as soft instrument track, so if the drummer track is the last selected track, it thinks you want to record to it. The problem is, you cannot record to it nor can you manually un-arm it!

Workaround:

select a another (not drummer) Soft Inst track before you start recording audio track. That will "manually" un-arm the drummer track and it will play back as expected. 

Reference:

https://www.logicprohelp.com/viewtopic.php?f=1&t=131646