A quick update on this. As this issue started last summer I stepped back through my backup versions of myserver installer and installed one from 2018 and it seems to be running well. I have experienced only one crash in weeks vs. several per day. And I am not convinced that this crash was related to the other issue I have been running into - I will continue to monitor this.
Although circumstantial this seems to be pointing to something changing in mid-2019.
Either way, I am running the version below and all seems to be good for now.