T_Cobblestone_Rough_N is incorrectly set to TC_Default not TC_NormalMap
1. Open a New Project with Starter Content
2. Open Texture2D'/Game/StarterContent/Textures/T_CobbleStone_Rough_N.T_CobbleStone_Rough_N'
RESULTS: Compression Settings are set to "TC_Default"
EXPECTED: Compression Settings are set to "TC_Normalmap"
Head over to the existingAnswerHub thread and let us know what's up.