For a little while now i have been having this issue of where when i load a save and start playing the game, everything works fine until i kill something, then i can't press E on the said body, thus not being able to loot this, it doesn't happen all the time however it always happens on Dragons and Vampires.
The only thing i can think of that changes anything to do with those 2 are Dawnguard and the 1.8 Update, i havent tried reverting back to a previous update though.
The only other option is that i have a mod that does something that bugs skyrim, here is my mod list;

Update.esmDawnguard.esmHearthFires.esmApachiiHair.esmApachiiHairFemales.esmApachiiHairMales.esmSPIKE.esmJSwords.esmLanterns Of Skyrim - All In One - Main.esmOmegared99-Compilation.esmunlimited shouts.espCustomSlowRing.espApocalypse - The Spell Package.espAtlas Map Markers.espAtlas Dawnguard.espBetter Embers.espBirdsHF.espBFSEffects.espCityForestV2_6.espCloaks.espDwarvenRifle_Guilmonex.espDragonPriestMaskQuestMarkers.espDragonboneCrossbow.espdD - Enhanced Blood Main.espEzEWorldMap.espFNISspells.espGreenWaterFix_Compatible.espHuntersDiscipline.esphothtrooper44_ArmorCompilation.espImmersive Weapons.espFollower_Addon_1_1_.espNPC_Overhaul_1_1_.espJaxonzOutfitter.espJSwordsDistributionBalancePlugin.espChesko_WearableLantern_Caravaner.espChesko_WearableLantern_Guards.espLanterns Of Skyrim - AIO - Dawnguard.espLanterns Of Skyrim - All In One - RCRN Legacy.espdD-No Spinning Death Animation.espOmegared99-WeaponSets.espProper Aiming.espdD - Realistic Ragdoll Force - Realistic.espMuiri's Problem.espSkyUI.espSummerSkies.espSummerSkyrim.espThe Paarthurnax Dilemma.espUnofficial Dawnguard Patch.espUnofficial Hearthfire Patch.espVLCollisionFix.espWATER.espChesko_WearableLantern.espWRF_by_RolandSir_TAWUTD_DG.espWyrmstooth.espnordicrangerarmor.espDr_Bandolier.espDr_BandolierDG.espBandolierForNPCMasterFile.espBandolierForNPCsCloaksOfSkyrim.espBandolierForNPCsCheaperBandoliersDawnguard.espalternate start - live another life.espauto unequip ammo.espbarenziahquestmarkers.espdynamic fires.esplockpicksweetspot.espnodawnguardshoutcooldown.esprcrnShaders.espRCRNvolumetric.espwaterarrows.espwhistle.esparmored-horses.espFantasy Music Overhaul.espThieves Guild Requirements.espUnofficial Skyrim Patch.espHorseman Combat Enhancement.espHorseman.esp

I have disabled the ones like the werewolf looting one but that didn't change anything.

Please help