Integration is timing out on the first time and works well when use click multiple times

I create a start process after clicking on submit button , it has integration it takes more than 3 mins and it times out , i increase the integration  time to more than 3 mins , It looks to me it is some how getting blank data on the first time but it works well we click multiple time  how do we build a process model that pulls a integration data which will take more time , what are the best practices for this use case ,