why grafana display the value at incorrect time slot?
I used grafana to display data from cloudwatch. I found grafana shows value incorrectly, for example, from this graph, the test_value is 1.000 at time 2021-02-28 07:29:00, 
however, from this graph, u can see the test_value is still 1.000 at time 2021-02-28 10:29:00, while the bar graph shows there should be no test_value at this time slot; 
it is very confused to see this? maybe the grafana setting is wrong? any suggestion?
You have sparse metric, so Grafana is showing the closest previous value. I would switch Hower tooltip Mode to Single instead of All series to avoid confusion.
You can also use CloudWatch Metric Math with FILL() function to fill the missing values of a metric with the specified filler value when the metric values are sparse.
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