Different values for the same CloudWatch Insights query

Hi all,

I am building a dashboard in grafana based on the following CloudWatch Insights query

parse @message /(?i)(?.+)</statuscode>/
| stats count(*) as cant by bin(1m) as time, concat('Status ', codigo) as statusCode
| filter @message like /(?i)(<.*faultcode>.*server</.*faultcode>)|(0</statuscode>)/
| limit 10000

However, I have observed that when the panel is reloaded, on some occasions the values change, even though the information is always the same.

What can I do in this case ?
Is it part of a Grafana bug?

Thank you, sorry for my bad English.