the main track sends are deactivated in a drum rack if the inline return channels are routed to the main returns.
this is annoying and means I have to make a separate track to route my drums to just so I can add an effect to the whole track in a 'dub' style.
A situation where this is bad -
a 'dub' setup, where sometimes I want to dub delay the snare drum, and sometimes I want to dub delay the whole kit.
To apply delay to the snare I have to route the snare via the annoying 'inline' re-routing hack, but this deactivates the main drum delay send so I can no longer apply dub delays to my entire kit.
It's an annoying limitation.