According to our documentation on Sprint Report:

For some issues, the Story Points are not shown in the Sprint Report. This is because the Sprint Report shows information initially included in the sprint – that is, what the team actually committed to. (That being said, if you add an issue with zero story points to a sprint, start the sprint and then change the Story Points, you will see the initial value in the Sprint Report.) If you would like to see all changes, switch to the Burndown Chart instead.

However, if an issue is created with 0 Story Points, then 2 Story Points are added to it before the Sprint Start and after the start of the Sprint they Story Points are changed to 3, 0 Story Points are displayed on the Sprint Report.

I believe it should be 2.