Not sure exactly why this is happening, I've filed a report with Steinberg and still waiting for a reply.
I have absolutely no problem with Cubase 13 Pro connecting to the Kontrol S88 MK3. But when I load Cubase 14 Pro, it seems like the drivers are not working correctly. I did notice that under Cubase 13 Pro I have under Midiin 2 (Kontrol S88 MK3) as the setting, and Midiout 2 (Kontrol S88 MK3). But under Cubase 14 Pro I instead have the 3 following selections: Kontrol S88 MK3 Daw, Kontrol S88 MK3 Ext, & Kontrol S88 Mk3 Main as options. I have tried all three and the Kontrol S88 MK3 does not connect with Cubase 14 at all. I am not sure why I am seeing different drivers names between Cubase 13 and 14. But the ones on 14 are not working right now. And I have the latest firmware update for the Kontrol S88 MK3. I also have updated Windows Pro 11 with latest drivers. And the following: Kontrol S88 MK3 DFU and Kontrol MK3 ODR are both listed under the Universal Serial Bus devices in the Windows Device manager. Slicked on both and Windows says these are the latest drivers. I had run the Native Access and downloaded the latest Hardware Connection Service which is 1.8.7 and it still does not connect to Cubase 14. Running the KSMK#_Updater_3_24.0_Win installed and rebooted the Kontrol S88 MK3 successfully and it showed the latest firmware as 1.8.7. But again it does work perfectly Cubase 13 Pro but not Cubase 14 Pro? Any suggestions would be appreciated.