BaselineExport missing classes in some circumstances #938

Customer is having an issue with Baseline Export where, on one namespace specifically, classes are not being exported. We trace it down to this returning false for the class name:

##class(%RoutineMgr).Exists(InternalName)

We confirm the class exists in the namespace, is compiled, and it is not mapped from any other database.

%RoutineMgr has a warning on it: "This class is used internally by InterSystems IRIS. You should not make direct use of it within your applications. There is no guarantee made about either the behavior or future operation of this class."

IRIS for UNIX (IBM AIX for System Power System-64) 2023.1.1 (Build 380U) Fri Jul 7 2023 23:34:07 EDT [Health:5.1.0-1.m1]