Is this a bug on Visualization ?

In Looker while i created a report adding Dim & Measures , the graph stack size are wrong , if you see y axis label you will understand [here labels are in order like 0,261,331,690,868,384,485] , column bar of value 384 is larger than column having value 868

But if i copy the same query and run in query terminal then column bars are correct

Can anyone help me to solve this issue please ? Or is it an existing looker issue ?

We need to mention type on the measures , then our issue got resolved.