There is a definite problem with Tracks > Merge. While RB is intended to be similar to PT, the operation of this command is different between programs. In PT, this command merges two MIDI Tracks to Audio providing a DXi/VSTi is available for use. If not, a blank Audio Track is created. In RB, this command works as expected by Merging two MIDI tracks to another MIDI track.

The Panels in both Programs are the same with tick boxes to allow effects to be incorporated. Interestingly, in RB you can also merge two AUDIO tracks with this command.

It looks as though the update for Merge > Tracks was implemented in RB only.