Amzon Orders Delay Issue

The problem is when we fetch orders from Veeqo API using created_at_min and update_at_min fields the orders especially amazon orders do not come in response e.g

#abc1234 order from the 1st of May will not come when we had fetch orders on that day. It will come if we run the script again like the 5th of May or maybe the 3rd of May.

Please advise.

Thank you