I’m quite new in the Rapture Session product 22.214.171.124.
However, after testing, figured out the issue with MIDI routing.
Btw, the standalone app is driven by Korg master (by iConnectMIDI4 on port 1), and everything working fine until press the DEC/INC keys on the keyboard. Then the midi input is still visible (on the onscreen keyboard), but no sound (configured by ASIO4ALL v2).
The same problems appears in Cantabile 3.0 host (with ASIO and WASAPI). Note that other plugins like Kontakt 5 and AIR Xpand!2 / DB33 works without any problem.
Do you have the clue what could be the problem ?