Getting wrong graph on counter metric with range increase operation!

Data source is prometheus.

When the graph plotted for the values as is, it is showing the correct graph.

When I applied rate - increase on the values, in few points in graph, it is showing values that make no sense

Here is the actual value from the counter meterics

See this itemsCreated Graph (It is linear)

To that data; when I apply increase(itemsCreated[$__rate_interval]) , it is giving me a graph as follows that make no sense.

I’m totally clueless on why it is happening, al the other graphs in my dash works fine, but this one alone behaves this way!

Please help me to debug this issue.