Update: As part of the June 2015 WWDC, Apple announced that iOS 8.4 arrives on June 30. This version includes a fix to the Apple Bluetooth GPS bug.
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As noted in previous blog post and via a customer notice email, iOS 8.3 introduced an incompatibility with previous generation GPS accessories like the DUAL XGPS 150 and some Bad Elf devices. The issue was escalated to Apple by ForeFlight and Bad Elf and expected to be resolved in the forthcoming iOS 8.4 update, based on PIREPs we have received. This issue has frustrated many pilots who own Wi-Fi only iPads or GPS accessories, and we are glad relief is on the way.