I have the same issue, but in Reaper (latest version). The Arturia Keylab Essentials 61 MIDI port is set for input (Enabled + Control) and output. I can't enable the MIDIIN2 and MIDIOUT2 because they are in use for Mackie Universal control. The VSTs respond to the faders and encoders, but there is no visual feedback on the Keylab display at all, and I can only choose patches with the buttons, not the main encoder (patch names are not shown either). Removing Mackie control and enabling the MIDI2 ports does not help.
UPDATE: Had hardware issue with Essentials, returned and got Keylab II instead, no problems anymore.