When multiple MIDI clips start, you can't hear the audio in the right channel, in the photo you can see in the header bar Output Level slider with only the left channel
It is not Battery, it is obviously your audio settings.
Most probably you assigned left & right channel in the same output.
As you can see in your own image, Battery plays fine. The header bar output level slider has to do with your Audio settings, not Battery
when battery plays a channel only if I change the kit the audio returns in both channels, if I then stop playback and start again it comes back, but this only happens with some midi clips.
