debugging QZRUCLSP API

I'm getting weird stuff from QZRUCLSP API (call service program procedure).

Through the QZRUCLSP API, I'm calling procedure 'Qp0zSpawn' in service
program QSYS/QP0ZSPWN.  The batch-immediate job starts okay.  Several times
I call my program that invokes QZRUCLSP API, and each time the BCI job is
spawned okay.

But, if I do "STRDBG PGM(___)" on my program that calls QZRUCLSP API, end
the debugger, execute "ENDDBG" and "SIGNOFF", sign back on, and call my
program that calls QZRUCLSP API again, then 'Qp0zSpawn' fails and the BCI
job is not started.

Huh?  The only way to make QZRUCLSP API work again is if I delete my
program that calls QZRUCLSP API, recompile it and reexecute it.

It seems that starting ILE debug on my program that calls QZRUCLSP API that
calls 'Qp0zSpawn' somehow registers an address in the system that forever
breaks my program from working correctly again (even if my program isn't
executed in debug mode).  Sign off/sign on doesn't fix it.  The only way to
clear this breakage is to delete and recreate my program.

This is weird shit.  Can someone help me invoke 'Qp0zSpawn' without this
problem?

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