The issue is resolved for my system by the 3.0.1-5 build. I tested interactively and as part of a Slurm batch job where I let Slurm provide the task count to mpiexec(1). (No -np option.)
I also confirmed that installation of libpmix2 is not required. Great work! -- James Ronald Lovell <ron163...@gmail.com> Huntsville, AL, USA