This doesn't happen all the time, either. It seems to happen when NPCs drop weapons, shield, etc. (possibly custom weapons from a mod...not sure), and then will not work for awhile. Then I'll find someone that is lootable and it seems fixed, only to happen again later.

I have never encountered this issue before with basically my normal mod list. I did remove http://skyrim.nexusmods.com/mods/3562 which I thought may be conflicting, but no luck. Could this be a problem with WB and my leveled lists or ASIS? Just throwing ideas out.
My Google fu has failed me on this one, so I ask here, has anyone ever experienced this glitch, and if so, any suggestions?
Mod List
Spoiler
=== Active Mod Files:
* 00 Skyrim.esm
* 01 Update.esm
* 02 Dawnguard.esm
* 03 ETaC - RESOURCES.esm
* 04 3rdEraWeaponsMoS.esm
* 05 Imp's More Complex Needs.esm [Version 0.24]
* 06 Omegared99-Compilation.esm
* 07 SkyMoMod.esm
* 08 ClimatesOfTamriel.esm
* 09 Lanterns Of Skyrim - All In One - Main.esm
* 0A brawlbug-plugin.esp
* 0B invinciblehawkfix.esp
* 0C Shadow Striping Fix.esp
* 0D Unofficial Skyrim Patch.esp [Version 1.2]
* 0E Unofficial Dawnguard Patch.esp [Version 1.0]
* 0F Chesko_Frostfall.esp
* 10 Improved Combat Sounds v2.1.esp
* 11 Rooster At Dawn v1.0.esp
* 12 ClimatesOfTamriel-Dungeons-Hazardous.esp
* 13 PersonalizedMusic_v4.0.esp
* 14 StaticMeshImprovementMod.esp
* 15 Economics of Skyrim.esp
* 16 Ars Metallica.esp [Version 1.1]
* 17 Ars Metallica - Dawnguard.esp [Version 1.1]
* 18 Better Skill and Quest Books Names.esp
* 19 BLESSINGS - Altar Descriptions.esp
* 1A Bring Out Your Dead.esp [Version 1.1]
* 1B Carriage1.esp
* 1C ETaC - Villages Complete.esp
* 1D ETaC - Morthal.esp
* 1E Catsofskyrim.esp
* 1F Chesko_WearableLantern.esp
* 20 Chesko_WearableLantern_Guards.esp
* 21 Chesko_WearableLantern_Candle_DG.esp
* 22 Chesko_SwiftPotion.esp
* 23 ClamsDropPearls.esp
* 24 Convenient Horses.esp
* 25 dD - Enhanced Blood Main.esp
* 26 Dogsofskyrim.esp
* 27 DungeonQuestAwareness.esp
* 28 Guard Dialogue Overhaul.esp
* 29 itsatrap!.esp
* 2A Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-3.esp
* 2B Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-2.esp
* 2C Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-1.esp
* 2D Lanterns Of Skyrim - All In One - Climates of Tamriel - default.esp
* 2E morevillageanimals.esp
* 2F SabreFurBag.esp
* 30 SkyMoMod_lists.esp
* 31 Skyrim Flora Overhaul.esp
* 32 YngolBarrowButtonFix.esp
* 33 Auto Unequip Ammo.esp
* 34 Character Creation Overhaul.esp
* 35 Chesko_LoreBasedLoadingScreens.esp
* 36 Footprints.esp
* 37 iHUD.esp
* 38 kuerteeAutoSaveAndTime.esp
* 39 BowOfGunnar.esp
* 3A BowOfShadows.esp
* 3B BretonLongbow.esp
* 3C Cloaks.esp
* 3D 1nivWICCloaks.esp [Version 2.1b]
* 3E 1nivWICSkyCloaksPatch.esp [Version 2.1]
* 3F Elemental Staves.esp
* 40 ElvenWeaponry.esp
* 41 FaalSizaan.esp
* 42 HBetterBows.esp
* 43 hothtrooper44_ArmorCompilation.esp
* 44 Hvergelmir's Armor Retexture - HAR.esp
* 45 NarquelionBow.esp
* 46 NorseMaille.esp
* 47 Omegared99-WeaponSets.esp
* 48 TCOSS.esp
* 49 TwisterBow.esp
* 4A 3rdEraWeapMoS-lvlList.esp
* 4B 3rdEraWeapMoS-rareCraft.esp
* 4C 3rdEraWeaponsMoS-ACE-Patch.esp
* 4D WVExpansion.esp
* 4E Dr_Bandolier.esp
* 4F DeadlyDragons.esp
* 50 buildablehouse.esp
* 51 ESFCompanions.esp [Version 0.1]
* 52 Gildergreen Regrown.esp [Version 1.2.1]
* 53 Run For Your Lives.esp [Version 1.1]
* 54 SBT Smal3.esp
* 55 SBT Smal1.esp
* 56 SBT Smal2.esp
* 57 SkyrimChimneysRW.esp
* 58 The Paarthurnax Dilemma.esp [Version 1.2.1]
* 59 Tundra Defense.esp
* 5A SkyrimCoinReplacer.esp
* 5B Better Dynamic Snow.esp
* 5C BetterQuestObjectives.esp
* 5D Deadly Traps.esp
* 5E GloriousGrass.esp
* 5F Headtracking.esp
* 60 masser Size x0.5.esp
* 61 NoAutoQuestStart_ThievesGuild_Reg.esp
* 62 NonEssentialChilds.esp
* 63 ReadIt.esp
* 64 Distant Detail.esp
* 65 secunda Size x0.5.esp
* 66 Sickly Diseases.esp
* 67 SkyTEST-RealisticAnimals&Predators.esp
* 68 VariousGuardReplacer.esp
* 69 Hunting in Skyrim.esp
* 6A dD - Realistic Ragdoll Force - Realistic.esp
* 6B IMCN - Overrides.esp
* 6C Better Vampires.esp
* 6D ToL_Core_by_Brevi.esp [Version 1.5]
* 6E ToL_SKSE_by_Brevi.esp [Version 1.0]
* 6F Apocalypse - The Spell Package.esp
* 70 DragonbornAscendant.esp
* 71 DragonbornAscendantDawnguardExpansion.esp
* 72 RuminationsontheRotmulaag.esp
* 73 BFSEffects.esp
* 74 DeadlySpellImpacts.esp
* 75 More Visible Soul Trap Effect.esp
* 76 Path of Shadows.esp
* 77 Realistic crime report radius.esp
* 78 Duel - Combat Realism.esp
* 79 ACE Realistic Fighting.esp
* 7A ACE BYOG.esp
* 7B ACE Speech.esp
* 7C CCO - Dynamic Skill Progression.esp
* 7D ArcheryDummyXP.esp
* 7E ACE Archery.esp
* 7F ACE Armor.esp
* 80 ACE Enchanting.esp
* 81 ACE Magic.esp
* 82 ACE Melee.esp
* 83 ACE Smithing.esp
* 84 ACE Synergy.esp
* 85 ABT - Faster Arrows Improved +50%.esp
* 86 ABT - Faster Bolts Improved +50%.esp
* ++ ABT - Merchants Arrows +25%.esp
* 87 ABT - Progressive Damage (with Nord Hero Arrow).esp
* 88 ABT - Recover 25% Less Arrows and Bolts.esp
* 89 TheEyesOfBeauty.esp
* 8A UFO - Ultimate Follower Overhaul.esp
* 8B UFO - Dawnguard AddOn.esp
* 8C ESFAela.esp [Version 0.4.3]
* 8D Follower Trap Safety.esp
* 8E BarbasLessAnnoying.esp
* ++ moveit.esp
* 8F Alternate Start - Live Another Life.esp [Version 2.1.3]
* 90 CCO - Diverse Races And Genders.esp
* 91 Height Adjusted Races with True Giants v5.esp
* 92 Height Adjusted Races v5.esp
* 93 WATER.esp
* 94 Blacksmithforge water fix.esp
* 95 Cartographers Map Markers.esp
* 96 dD-Dawnguard-EBT Patch.esp
* 97 Bashed Patch, 0.esp
* 98 Automatic Variants.esp
* 99 ASIS-Dependency.esp
* 9A ASIS.esp
=== Active Mod Files:
* 00 Skyrim.esm
* 01 Update.esm
* 02 Dawnguard.esm
* 03 ETaC - RESOURCES.esm
* 04 3rdEraWeaponsMoS.esm
* 05 Imp's More Complex Needs.esm [Version 0.24]
* 06 Omegared99-Compilation.esm
* 07 SkyMoMod.esm
* 08 ClimatesOfTamriel.esm
* 09 Lanterns Of Skyrim - All In One - Main.esm
* 0A brawlbug-plugin.esp
* 0B invinciblehawkfix.esp
* 0C Shadow Striping Fix.esp
* 0D Unofficial Skyrim Patch.esp [Version 1.2]
* 0E Unofficial Dawnguard Patch.esp [Version 1.0]
* 0F Chesko_Frostfall.esp
* 10 Improved Combat Sounds v2.1.esp
* 11 Rooster At Dawn v1.0.esp
* 12 ClimatesOfTamriel-Dungeons-Hazardous.esp
* 13 PersonalizedMusic_v4.0.esp
* 14 StaticMeshImprovementMod.esp
* 15 Economics of Skyrim.esp
* 16 Ars Metallica.esp [Version 1.1]
* 17 Ars Metallica - Dawnguard.esp [Version 1.1]
* 18 Better Skill and Quest Books Names.esp
* 19 BLESSINGS - Altar Descriptions.esp
* 1A Bring Out Your Dead.esp [Version 1.1]
* 1B Carriage1.esp
* 1C ETaC - Villages Complete.esp
* 1D ETaC - Morthal.esp
* 1E Catsofskyrim.esp
* 1F Chesko_WearableLantern.esp
* 20 Chesko_WearableLantern_Guards.esp
* 21 Chesko_WearableLantern_Candle_DG.esp
* 22 Chesko_SwiftPotion.esp
* 23 ClamsDropPearls.esp
* 24 Convenient Horses.esp
* 25 dD - Enhanced Blood Main.esp
* 26 Dogsofskyrim.esp
* 27 DungeonQuestAwareness.esp
* 28 Guard Dialogue Overhaul.esp
* 29 itsatrap!.esp
* 2A Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-3.esp
* 2B Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-2.esp
* 2C Lanterns Of Skyrim - All In One - Climates of Tamriel - lvl-1.esp
* 2D Lanterns Of Skyrim - All In One - Climates of Tamriel - default.esp
* 2E morevillageanimals.esp
* 2F SabreFurBag.esp
* 30 SkyMoMod_lists.esp
* 31 Skyrim Flora Overhaul.esp
* 32 YngolBarrowButtonFix.esp
* 33 Auto Unequip Ammo.esp
* 34 Character Creation Overhaul.esp
* 35 Chesko_LoreBasedLoadingScreens.esp
* 36 Footprints.esp
* 37 iHUD.esp
* 38 kuerteeAutoSaveAndTime.esp
* 39 BowOfGunnar.esp
* 3A BowOfShadows.esp
* 3B BretonLongbow.esp
* 3C Cloaks.esp
* 3D 1nivWICCloaks.esp [Version 2.1b]
* 3E 1nivWICSkyCloaksPatch.esp [Version 2.1]
* 3F Elemental Staves.esp
* 40 ElvenWeaponry.esp
* 41 FaalSizaan.esp
* 42 HBetterBows.esp
* 43 hothtrooper44_ArmorCompilation.esp
* 44 Hvergelmir's Armor Retexture - HAR.esp
* 45 NarquelionBow.esp
* 46 NorseMaille.esp
* 47 Omegared99-WeaponSets.esp
* 48 TCOSS.esp
* 49 TwisterBow.esp
* 4A 3rdEraWeapMoS-lvlList.esp
* 4B 3rdEraWeapMoS-rareCraft.esp
* 4C 3rdEraWeaponsMoS-ACE-Patch.esp
* 4D WVExpansion.esp
* 4E Dr_Bandolier.esp
* 4F DeadlyDragons.esp
* 50 buildablehouse.esp
* 51 ESFCompanions.esp [Version 0.1]
* 52 Gildergreen Regrown.esp [Version 1.2.1]
* 53 Run For Your Lives.esp [Version 1.1]
* 54 SBT Smal3.esp
* 55 SBT Smal1.esp
* 56 SBT Smal2.esp
* 57 SkyrimChimneysRW.esp
* 58 The Paarthurnax Dilemma.esp [Version 1.2.1]
* 59 Tundra Defense.esp
* 5A SkyrimCoinReplacer.esp
* 5B Better Dynamic Snow.esp
* 5C BetterQuestObjectives.esp
* 5D Deadly Traps.esp
* 5E GloriousGrass.esp
* 5F Headtracking.esp
* 60 masser Size x0.5.esp
* 61 NoAutoQuestStart_ThievesGuild_Reg.esp
* 62 NonEssentialChilds.esp
* 63 ReadIt.esp
* 64 Distant Detail.esp
* 65 secunda Size x0.5.esp
* 66 Sickly Diseases.esp
* 67 SkyTEST-RealisticAnimals&Predators.esp
* 68 VariousGuardReplacer.esp
* 69 Hunting in Skyrim.esp
* 6A dD - Realistic Ragdoll Force - Realistic.esp
* 6B IMCN - Overrides.esp
* 6C Better Vampires.esp
* 6D ToL_Core_by_Brevi.esp [Version 1.5]
* 6E ToL_SKSE_by_Brevi.esp [Version 1.0]
* 6F Apocalypse - The Spell Package.esp
* 70 DragonbornAscendant.esp
* 71 DragonbornAscendantDawnguardExpansion.esp
* 72 RuminationsontheRotmulaag.esp
* 73 BFSEffects.esp
* 74 DeadlySpellImpacts.esp
* 75 More Visible Soul Trap Effect.esp
* 76 Path of Shadows.esp
* 77 Realistic crime report radius.esp
* 78 Duel - Combat Realism.esp
* 79 ACE Realistic Fighting.esp
* 7A ACE BYOG.esp
* 7B ACE Speech.esp
* 7C CCO - Dynamic Skill Progression.esp
* 7D ArcheryDummyXP.esp
* 7E ACE Archery.esp
* 7F ACE Armor.esp
* 80 ACE Enchanting.esp
* 81 ACE Magic.esp
* 82 ACE Melee.esp
* 83 ACE Smithing.esp
* 84 ACE Synergy.esp
* 85 ABT - Faster Arrows Improved +50%.esp
* 86 ABT - Faster Bolts Improved +50%.esp
* ++ ABT - Merchants Arrows +25%.esp
* 87 ABT - Progressive Damage (with Nord Hero Arrow).esp
* 88 ABT - Recover 25% Less Arrows and Bolts.esp
* 89 TheEyesOfBeauty.esp
* 8A UFO - Ultimate Follower Overhaul.esp
* 8B UFO - Dawnguard AddOn.esp
* 8C ESFAela.esp [Version 0.4.3]
* 8D Follower Trap Safety.esp
* 8E BarbasLessAnnoying.esp
* ++ moveit.esp
* 8F Alternate Start - Live Another Life.esp [Version 2.1.3]
* 90 CCO - Diverse Races And Genders.esp
* 91 Height Adjusted Races with True Giants v5.esp
* 92 Height Adjusted Races v5.esp
* 93 WATER.esp
* 94 Blacksmithforge water fix.esp
* 95 Cartographers Map Markers.esp
* 96 dD-Dawnguard-EBT Patch.esp
* 97 Bashed Patch, 0.esp
* 98 Automatic Variants.esp
* 99 ASIS-Dependency.esp
* 9A ASIS.esp