Operating system: Windows 10 Family Edition
Graphics card: Intel(R) HD Graphics 630 & NVIDIA GeForce GTX 1050
Broken: 2.80, 9149e894210, blender2.8, 2018-10-16
Short description of error
When the material's blend mode is set to Alpha Blend and Show Backside is on, said backside completely obscures the frontside (at least when transparency 0%, as the frontside gradually becomes more visible as transparency increases).
Exact steps for others to reproduce the error