VM crash on KVM Bare Metal

We are facing random VMs shutdown issue on RHEL-KVM Bare Metal. Though there is no any load on the VM. We are running Ubuntu as a guest OS on VM. Even in /var/log/messages the logs are being generated stated that Core Dump process has been initiated systemd[1]: Started Process Core Dump (PID 2739631/UID 0). But we couldn't find Core Dump file at /var/lib/systemd/coredump location.
Please find attached screenshot for the reference.