I am seeing a Calculator dropping to zero for a single interval when I know that the Metric Grouping is not zero during that same interval. I have tied both type of Metrics for a sum Operation. (counter and Interval Count). Both show zero for random Intevals. I am using APM Enterprise manager 9.6. The agent versions is 220.127.116.11 but I would think the calculation is all on the EM side. Has anyone else seen this issue and is there a fix?