There had been a reproducible case in the past and of course it had been investigated by TS (it was fixed within Creo Elements/Pro 5.0, see CS22232)
So the issue you see, seems to be similar, but not the same. In order to investigate, TS will need to be able to reproduce it - at least now and then.
As the previously fixed example shows, it might be related to your model.
I had also observed in past releases, that when I left Mechanica mode while running an analysis, then returning to Mechanica (now Simulate), the run status was no longer showing, although the engine was still running. But I didn't see this again in recent years.