Operating system: Windows 7
GPU: Radeon Vega 64, Divider version: 19.12.2
CPU: Intel Core i7-5960X
Working: blender-2.79b-f4dc9f9d68b-windows64 (official release)
Broken: blender-2.83-9d90cad3ed39-windows64 (build bot)
Short description of error
Background images don't appear to work in any way*, whilst using Stereo 3D, that I have tested.
Exact steps for others to reproduce the error
*When loading the 2.83 file; toggle between individual and Stereo 3D.
For some reason it sometimes actually loads (incorrectly) when opening this file.