Grafana traffic sum is strange

hello. I am monitoring switch traffic values ​​using telegraf snmp collection. Looking at the L3 active standby, it looks fine, but when adding the values, the graph fluctuates up and down.
As I zoom in on the graph, I get values ​​at different times. So the graph seems to fluctuate. Is there any way to get the values ​​at the same time or the graph stays constant?

The graph line is not maintained and the picture of taking 0 and coming up again is repeated.