EXC_BAD_ACCESS (code=2, address=0x7fff2384c4e1)

I've been developing my MacOS app on OS 10.14~10.15.7 and Xcode 11.3.1.
Recently I upgrade my OS version to 11.0.1 but keep Xcode version the same.

Run my app I will encounter following exception:

Code Block 
EXC_BAD_ACCESS (code=2, address=0x7fff2384c4e1) 

When I type cmd in lldb:

Code Block 
image lookup -va 0x7fff2384c4e1

It shows following information:

Code Block Address: AppKit[0x00007fff2377a4e1] (AppKit.TEXT.objc_methlist + 737)
   Summary: AppKit`_OBJC_$_INSTANCE_METHODS_NSSeparatorToolbarItemView + 49
    Module: file = "/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit", arch = "x86_64"
    Symbol: id = {0x0000f500}, range = [0x00007fff2384c4b0-0x00007fff2384c5c0), mangled="_OBJC_$_INSTANCE_METHODS_NSSeparatorToolbarItemView"

And I found if I go to "Edit Scheme" -> "Run" tab -> "info" tab -> uncheck "Debug executable"
AP will launch normally.

Does someone know how to resolve this issue?
Many thanks.