Linear color space only

Steps:
1. Open repro project (please use the one from comment)
2. On Project View, make the thumbnail to largest size, observe the textures
3. Select the material
4. Click on any texture slot to open Texture Select popup window
5. Observe the textures

Actual Result : The texture looks saturated and sometimes normal map will be black
Expected Result : The texture should look the same with how it looks originally
Please see screenshot in comment.

Reproducible in :
2017.3.0b9, 2017.3.0b8, 2017.3.0b7,2017.3.0b2, 2017.2.0p2, 2017.1.2p2

Note: after opening the project with different versions, only the thumbnail in Texture Select window is wrong, but it might change after a few clicks