This looks a lot like some crashes (hangs, actually) I had today.
Fairly new MacMini M2 (16GB), Ventura 13.4, Dorico 5.0.10, NP 4.0 all working as a charm.
External CME XKey37 midi keyboard (plugged directly into USB-port on Mini) works for note input (including sound on my headphones), until I hit one of the octave shifts on the XKey37. Dorico hangs and has to be force-quit. No trace left of an orphaned audio engine in Activity Monitor. When restarting Dorico, it asks to send you the crash report, so you may have these Diagnostics already. Hope this helps!
Dorico Diagnostics.zip (1.1 MB)
(Edit to add: after restarting Dorico, the octave shift is applied after all 
)