Steps to reproduce:
1. Open attached project
2. Enter play mode
3. Music is playing on the left side of the headphones/speakers at the beginning, and towards the right in the end
(Might need to wait till the animation loops, which is about 10 seconds)

Alternate repro from new project:
1. Open new project
2. Add any music/sound effect that is long and continuous
3. Create timeline and add an Audio track and an animation track for the camera
4. Press record on the camera animation and record a couple of frames of the camera moving around the timeline object
5. Stop recording and listen to the playback
6. Music/Sound will travel from one headphone side/speaker to the other based on camera motion

Expected: Selecting the audio track shows the Spatial blend to be set at 2D so the expectation is that no 3D positioning should have any effect on the audio being played
Actual: The audio comes in from one or the other side of the headphones/speakers based on listener position

Reproduced on:
Version 2019.3.0a4 (7368acd360f4)
Tue, 21 May 2019 18:40:41 GMT
Branch: trunk

Reproduced on 2019.3.0a5, 2019.2.0b5, 2019.1.6f1, 2019.1.0b10, 2019.1.0b1, 2019.1.0a11, 2019.1.0a10, 2019.1.0a9

No repro: 2018.4.2f1, 2019.1.0a1, 2019.1.0a8