Hello Muhammed,
The first question I would have is: what is the datatype of the month field you're using?
If it is a string field, the month names will be stored as text values, and so when they're sorted, they'll be sorted in alphabetical order (ie: April, August, December, February, January, July, June, etc.). To change this, you can parse the dates according to this article here to get them to sort in the proper order: Parse dates—Operations Dashboard for ArcGIS | Documentation
However, if it is a date field, you can set the display style of this field to show just the month, and it will still sort in chronological order. The display type can be changed in the configure popups tool in the map viewer for your data layer.
I hope this helps.