SNIFF report (these meshes are all found in Unofficial Skyrim Special Edition Patch.bsa):
Spoiler:
meshes\architecture\whiterun\wrbuildings\wrfarmhousewindmill.nif
1 BSXFlags: External_Emit flag is set but no shaders found with the same flag
meshes\clutter\carts\handcart01wheel.nif
13 BSTriShape: contains vertex colors but missing Vertex Colors shader flag in 14 BSLightingShaderProperty
meshes\dlc01\clutter\vampireclutter\dlc01vampirethrallfeedta02.nif
18 BSLightingShaderProperty: Environment_Mapping shader flag is set but shader type is not Environment Map
18 BSLightingShaderProperty: Eye Envmap shader type is used but missing Eye_Environment_Mapping shader flag
meshes\dlc01\clutter\vampireclutter\dlc01vampirethrallfeedta01.nif
14 BSLightingShaderProperty: Environment_Mapping shader flag is set but shader type is not Environment Map
14 BSLightingShaderProperty: Eye Envmap shader type is used but missing Eye_Environment_Mapping shader flag
meshes\loadscreenart\loadscreendeer.nif
3 BSLightingShaderProperty: Environment_Mapping shader flag is set but shader type is not Environment Map
3 BSLightingShaderProperty: Eye Envmap shader type is used but missing Eye_Environment_Mapping shader flag
6 BSLightingShaderProperty: Environment_Mapping shader flag is set but shader type is not Environment Map
6 BSLightingShaderProperty: Eye Envmap shader type is used but missing Eye_Environment_Mapping shader flag
meshes\furniture\clutter\milllogpile.nif
277 NiPSysData: Has Vertex Colors is false but Vertex Colors shader flag is set in 279 BSEffectShaderProperty
293 NiPSysData: Has Vertex Colors is false but Vertex Colors shader flag is set in 295 BSEffectShaderProperty
354 NiPSysData: Has Vertex Colors is false but Vertex Colors shader flag is set in 356 BSEffectShaderProperty
meshes\uskp\architecture\solitude\uskpspatiowallcolumn.nif
1 BSXFlags: BSX has Havok flag but no bhkCollisionObject or bhkRigidBody blocks
meshes\loadscreenart\loadscreenhorse_and_rider.nif
30 BSTriShape: contains vertex colors but missing Vertex Colors shader flag in 31 BSLightingShaderProperty
meshes\usleep\architecture\windhelm\usleepwindhelmpalaceceilingplug.nif
1 BSXFlags: BSX has Havok flag but no bhkCollisionObject or bhkRigidBody blocks
meshes\ussep\weapons\boundweapons\bounddagger.nif
2 BSXFlags: BSX has Havok flag but no bhkCollisionObject or bhkRigidBody blocks
Figured I'd report since BSX flags are usually a quick fix.