No, this isn’t a minor issue seeing that containment failed to prevent system changes, such as creating a new service that was not prevented from being created outside the container environment.
Comodo needs to perform code changes so that contained applications either can not access the service control manager through a named pipe, or to allow access but make sure it only stays within the containment.
If it wasn’t an issue to take serious then they would not have fixed it in xcitium client security. It is not as simple as making a tweak to the configuration, because even adding \device\namedpipe\ntsvcs to protected files did not prevent the bypass.
Also UAC doesn’t apply when not using restriction levels as the the default setting is to run virtually.