System Information
Operating system: Windows 10
Graphics card: Nvidia Geforce GT 220

Blender Version
Broken: (2.81)
Worked: (2.80)

Short description of error
while applying textures to objects some random faces were disappearing from the veiwport, and in Renders without using any Transparent textures. each time i apply a different texture different faces disappear, it only happens on objects with multiple textures applied

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

with the default cube in edit mode i added a single loop cut to each edge and then bevelled them all, i then extruded those bevelled faces in by pressing e then s. i created 2 textures in the properties menu ( one is a black metallic shader, the other was a plain white shader) i applied the second texture to the inset faces and they proceed to vanish.