MongoDB Server (MongoDB) Service Terminated unexpectedly - MongoDb 4.2 on Upcloud Windows

We use Upcloud Windows and run MongoDB 4.2
We never had this issue in the past 3years. Last few months happening frequently.
Being a SaaS platform we cannot afford any such Service Disruption.
Is this because of HW or System Software or because of Application? How to investigate.

The error message and log is not helpful for further investigation. Please advise how to go about