You can workaround the issue using a symbolic breakpoint.
Add a symbolic breakpoint with the following settings:
Symbol: _mainModule: dyldAction: Debugger Command with the command process handle -n false -s false SIGCONTOptions: Check Automatically continue after evaluating actions
process handle -n false -s false SIGCONT
Workaround by choosing "Debug Process as Root" in Schema "Run" -> "Info"
Apple Forum discussion
I'm on Big Sur beta10 and xcode12 beta1.Removing "debug executable" tick in run-debug scheme page fixed it for me.You can get there by Product->Scheme->edit scheme...
Here is a screenshot: