Mac OSX Yosemite 10.10.4
MacBook Pro (Retina, 15-inch, Late 2013)
Processor 2.6 GHz Quad Intel Core i7
Memory 16 GB 1600MHz DDR3
Details to recreate issue:
Drag in an audio file with key information, click on the file and check info line to confirm the audio file has root key information embedded. Save the project and close it. when you open it back up click on the file now and check the info line, there’s no key info so therefore it plays out of key to the rest of the session.