Is it intended that new copies of MetricContext retain error details

[awsbillz]

Am using and extending the MetricsLogger and discovered that error details also get copied to fresh MetricsContext objects. Is it the intended behavior for all properties, including error details to be carried forward on new and copied MetricsContext objects?

https://github.com/awslabs/aws-embedded-metrics-python/blob/master/aws_embedded_metrics/logger/metrics_logger.py#L104
https://github.com/awslabs/aws-embedded-metrics-python/blob/master/aws_embedded_metrics/logger/metrics_context.py#L127