Using 5.6 and I can see my static meshes with their textures in the content browser. But for some reason some of them their textures suddenly disappear and its the default Grey. I can see the Material Instances with their colors and texture showing in the preview thumbnail. As soon as I click to open it it turns grey and the MI window shows there is no Parent material. If I right click and ask to show parent material it also breaks them and they show grey. But if I reboot UE the previews come back but the same problem persists. What could be causing these references to suddenly disappear?
UPDATE FIX KIND OF, bug still caused it but Identified issue: Finally was able to identify one of the Parent materials that broke causing this. I also updated to UE 5.6.1 today which mightve introduced the bug. The M_PBRMaster material had an Emissive Mask texture sample that had no texture assigned and showed as null. I’m not sure if it was like that before, but as soon as I added a T_DefaultMask texture it worked again. So for some reason, the Textures are getting unassigned from the Texture Sample nodes.