Hey there, there might a non-determinism happening with yosys. The following screenshots are from OpenROAD at the Yosys stage, both logs should have no differences among them. They come from a pair of runs with a no-op branch.
I would hope for some guidance on how to investigate further. We seem to be using a different instance master at message 23.10 for Mapping module
With sky130hd/microwatt:
I also created an issue in OpenROAD GH for this at: Yosys non-determinism · Issue #9943 · The-OpenROAD-Project/OpenROAD · GitHub