I have the same problem, almost every morning. When I looked in the Windows 10 reliability history, I found that Multiplicity was crashing on my primary as well. Here are the details:
Description
Faulting Application Path: C:\Program Files (x86)\Stardock\Multiplicity\Multipl2.exe
Problem signature
Problem Event Name: APPCRASH
Application Name: Multipl2.exe
Application Version: 3.0.0.0
Application Timestamp: 52af40db
Fault Module Name: StackHash_3418
Fault Module Version: 10.0.18362.387
Fault Module Timestamp: a4208572
Exception Code: c0000374
Exception Offset: PCH_BD_FROM_ntdll+0x0007232C
OS Version: 10.0.18362.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 3418
Additional Information 2: 3418083c0d58271094d4e72378e37dbc
Additional Information 3: 7d8c
Additional Information 4: 7d8ca1f0911b26450c7c5d8ee9cd9793
Extra information about the problem
Bucket ID: c5135cea241597ad5f821110c6135084 (2270395925888454788)