Order of tasks in GroupAggregation

[PolamarasettyRohitha]

Group Aggregation is not preserving the order of tasks.

I enqueued few tasks under same group name, when they are executed, order of execution of those tasks was different from the order that were enqueued.

example:
Order of enqueue of tasks in a group:
{"UserID":0,"TemplateID":"some:template:id"}
{"UserID":1,"TemplateID":"some:template:id"}
{"UserID":2,"TemplateID":"some:template:id"}
{"UserID":3,"TemplateID":"some:template:id"}
{"UserID":4,"TemplateID":"some:template:id"}
{"UserID":5,"TemplateID":"some:template:id"}

when I process those tasks, the order of their execution is :
{"UserID":1,"TemplateID":"some:template:id"}
{"UserID":5,"TemplateID":"some:template:id"}
{"UserID":0,"TemplateID":"some:template:id"}
{"UserID":3,"TemplateID":"some:template:id"}
{"UserID":2,"TemplateID":"some:template:id"}
{"UserID":4,"TemplateID":"some:template:id"}

Is there a way to preserve order of tasks those are grouped.

Thank you.