Re: iOS 8.3 and audio playback
My 2014 has similar problems. I find that if unplug the uSB cable and use Bluetooth, my iPhone 5 works OK under iOS 8.3. It's clear that Apple and Chrysler have incompatibilities. Whatever car I buy next must have Apple CarPlay.
2014 Jeep Grand Cherokee Overland 3.6L 4x4; Quadra-Lift II; ORA II; Advanced Technology Group. Built April 2013. At 41,000 miles transmission valve body assembly replaced under warranty. At 43,000 miles (70 000 km) transmission replaced under warranty. Now has 58,000 miles (87 000 km). Goodyear Wrangler All-Terrain Adventure with Kevlar tires.