BLE takes too much time while sending data from iOS 7.1 to iOS 8

Question

I have a strange issue. I am developing an app in which I am sending Chunks in 20-20 bytes..

Everything is working fine.

When I am sending Bytes data from iOS 8 to iOS 8 device it take around 4-5 second to transfer from one device to another, but my problem is when I am sending Bytes data from iOs 7.1 to iOs 8 or reverse, It take around 17-20 seconds to transfer the data from one device to any device.

Why it's taking too much time in iOS 7.1 to iOS 8 or reverse?

Answer 1

Try to look at some of the links below. That might help you.

Link1

Link2

This is just a reference of links that might help you.

Credit goes to them for this answer.