Bass / Midi is very different when using logic

When listening to the dubler bass the notes move and slide and you can make complex lines, but when I route the midi to Logic and use NI Massive for example, the midi is basic and only captures some of the notes…

whats the fix?

This is likely due to the synth parameters on the bass you are controlling. Are you using pitch bend? If so you’ll want to make sure the pitch bend range in Massive matches the one sent in Dubler

You may also want to make sure the ADSR in Massive roughly matches the bass patch in Dubler so it has the same response. Which specific preset in Dubler are you trying to recreate?