I won’t be able to tell much from the Cubase dump, unfortunately.
Same question I’m asking others here: Do you use any third-party MIDI drivers, specifically Korg or m-audio/midisport?
There are issues with both the Korg USB MIDI drivers and the midisport driver. In moth cases, those drivers aren’t actually needed unless you have a truly ancient midisport with the serial port on the back (it pre-dates USB MIDI 1.0 Class)
See here for uninstalling them if this is the case.