Once a specific control is connected to the midi remote, it stops being connected to a track. That’s a feature by design, since you don’t want notes to play when you push a button that’s intended to mute or solo a track.
I don’t have a similar Novation Device in my collection, so I can’t give a very specific answer. But in general terms, I can think of two different approaches to deal with this:
Disconnect the pads that are supposed to be your drum pads from being assigned in the MIDI Remote environment.
If possible, configure the Launchkey, so the pads send their notes on a different midi channel (that is hopefully not also assigned in the MIDI Remote)