And for what it’s worth, here’s the relevant part of the crash log. I think I might have to just submit a report to Apple and hope it gets fixed in a future update.
Process: Logic Pro X [730]
Path: /Applications/Logic Pro X.app/Contents/MacOS/Logic Pro X
Identifier: com.apple.logic10
Version: 10.4.5 (5076)
Build Info: MALogic-5076000000000000~2
App Item ID: 634148309
App External ID: 831355815
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Logic Pro X [730]
User ID: 501
Date/Time: 2019-06-13 20:29:15.240 -0600
OS Version: Mac OS X 10.14.5 (18F132)
Report Version: 12
Anonymous UUID: D08A1154-46CD-935A-C146-40143BD0778F
Time Awake Since Boot: 830 seconds
System Integrity Protection: enabled
Crashed Thread: 5 SeqTimer
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000007c
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [730]
VM Regions Near 0x7c:
-->
__TEXT 000000010a6cd000-000000010c399000 [ 28.8M] r-x/rwx SM=COW /Applications/Logic Pro X.app/Contents/MacOS/Logic Pro X
Application Specific Information:
MALondonIII | e84d8ecce95d250e32c0f73d4c79d2b685e8718a80997af9a2b0f6c679216e01 | f0f16a31943d0462f17b5a9cb01433111f8f39e7 | 2019-06-11_16:38:41
Thread 5 Crashed:: SeqTimer
0 com.apple.music.apps.midi.device.plugin.nanoKONTROL2 0x0000000115705695 messageProc(long, long, ...) + 133
1 com.apple.logic10 0x000000010b081c79 0x10a6cd000 + 10177657
2 com.apple.logic10 0x000000010b0839d5 0x10a6cd000 + 10185173
3 com.apple.logic10 0x000000010b08587f 0x10a6cd000 + 10193023
4 com.apple.logic10 0x000000010ad90b33 0x10a6cd000 + 7093043
5 com.apple.logic10 0x000000010ad8fe89 0x10a6cd000 + 7089801
6 com.apple.CoreServices.CarbonCore 0x00007fff40e004e2 TimerThread + 127
7 libsystem_pthread.dylib 0x00007fff6bc002eb _pthread_body + 126
8 libsystem_pthread.dylib 0x00007fff6bc03249 _pthread_start + 66
9 libsystem_pthread.dylib 0x00007fff6bbff40d thread_start + 13