Just playing on my three Win11 desktops, I see it was happening just to the corporate laptop and not associated with the OneDrive location.
Then, magically after pinning a folder, subsequent pins of other files are going fine.
Event Viewer gets this application log with the crash, always same "Fault offset":
Faulting application name: explorer.exe, version: 10.0.22621.3527, time stamp: 0x00c8ba7a
Faulting module name: Start10_64.dll, version: 2.0.7.4, time stamp: 0x660c2929
Exception code: 0xc0000005
Fault offset: 0x000000000000ece0
Faulting process id: 0x0x13344
Faulting application start time: 0x0x1DABDC7BFD8EEDC
Faulting application path: C:\WINDOWS\explorer.exe
Faulting module path: C:\Program Files (x86)\Stardock\Start11\Start10_64.dll
Report Id: c5f4f74e-885c-447d-989f-910ba7b25563
Faulting package full name:
Faulting package-relative application ID:
and one time gave this event from ntdll.dll:
Faulting application name: explorer.exe, version: 10.0.22621.3527, time stamp: 0x00c8ba7a
Faulting module name: ntdll.dll, version: 10.0.22621.3527, time stamp: 0x92b2df34
Exception code: 0xc0000005
Fault offset: 0x0000000000033aca
Faulting process id: 0x0xC82C
Faulting application start time: 0x0x1DABDB62BF390C4
Faulting application path: C:\WINDOWS\explorer.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
Report Id: 61253514-600d-4a3d-b8c4-9b138d615db2
Faulting package full name:
Faulting package-relative application ID:
FWIW, my Windows build: Windows 11 Pro, 23H2, 22631.3593
Not sure what it takes to get into the state that leads to crashes. Will try again when system next reboots. Would attaching a debugger to explorer and getting a stack trace at this fault be helpful?