We experience an issue where iOS shows a "Bluetooth pairing request" dialog when an iOS 9 device connects to iOS 8, even though we dont use any encrypted service/characteristics. The dialog pops up on both devices, as soon as we call connectPeripheral: from an iOS 9 to iOS 8. When we connect from iOS 8, no dialog is shown.
This issue has already been described here: https://forums.developer.apple.com/thread/8940
We get the same popup as reported by Ricky.L (screenshot http://cl.ly/ciLt).
This looks like a bug to us, as it only happens in this specific case described above. Has anyone experienced the same behavior?