Massive FPS drop in game at random intervals

[Azzhat]

For some reason, I keep getting massive FPS drops when I play at random intervals. Especially in the Museum with the Legacy of the Dragonborn. My PC specs are: 
 

Spoiler

    Windows 10 Home 64-bit
CPU
    AMD Ryzen  
    Threadripper 14nm Technology
RAM
    32.0GB Dual-Channel Unknown (18-18-18-39)
Motherboard
    Gigabyte Technology Co. Ltd. X399 AORUS Gaming 7 (SP3r2)    
Graphics
    ELEFW328C (1360x768@60Hz)
    8192MB ATI Radeon RX 580 Series (ASUStek Computer Inc)    38 °C
Storage
    5589GB Western Digital WDC WD6003FZBX-00GXAB0 (SATA )    32 °C
    931GB SanDisk SSD PLUS 1000GB (SATA (SSD))    28 °C
Optical Drives
    ASUS DRW-24F1ST d
Audio
    Realtek High Definition Audio 

And my load order is:
 

Spoiler

GameMode=SkyrimSE

Skyrim.esm=1
Update.esm=1
Dawnguard.esm=1
HearthFires.esm=1
Dragonborn.esm=1
3DNPC.esp=1
LegacyoftheDragonborn.esm=1
Vigilant.esm=1
Dwarfsphere.esp=1
Schlongs of Skyrim - Core.esm=1
BlackSacramentArmor.esl=1
Stormfang.esl=1
Grimsever.esl=1
RSkyrimChildren.esm=1
BSAssets.esm=1
SpectralBlades.esl=1
BSHeartland.esm=1
Unslaad.esm=1
BSGlenroyAK.esl=1
BS_DLC_patch.esp=1
hdtHighHeel.esm=1
Unofficial Skyrim Special Edition Patch.esp=1
KarlovManorSSE.esp=1
AMB Glass Variants Lore.esp=1
BlackSacramentDBReplacer.esp=1
AnnaHoneyside.esp=1
SOS - VectorPlexus Muscular Addon.esp=1
aMidianborn_Skyforge_Weapons.esp=1
FNISSexyMove.esp=1
XPMSE.esp=1
SOSRaceMenu.esp=1
RaceMenu.esp=1
RaceMenuPlugin.esp=1
RaceMenuHH.esp=1
DX Druid Armor.esp=1
Immersive Sounds - Compendium.esp=1
KSHairdosSMP.esp=1
KSWigsSMP.esp=1
TheEyesOfBeauty.esp=1
Castle Volkihar Rebuilt.esp=1
Female Mannequins SSE.esp=1
Wildcat - Combat of Skyrim.esp=1
LeftHandRings.esp=1
LeftHandRings-1stPersonView.esp=1
cheery_AetherArtifactsCrafting-r2.esp=1
Weapons Armor Clothing & Clutter Fixes.esp=1
WACCF_Armor and Clothing Extension.esp=1
WACCF_BashedPatchLvlListFix.esp=1
MeekoHuskyEssential.esp=1
Growl - Werebeasts of Skyrim.esp=1
EastEmpirePendantsMarkers.esp=1
Andromeda - Unique Standing Stones of Skyrim.esp=1
LazyTools.esp=1
playerequipmentmanager.esp=1
Predator Vision.esp=1
Predator Vision - Sense Dead.esp=1
TimingIsEverything.esp=1
CWRepairs.esp=1
bloodbond.esp=1
Gildergreen Regrown.esp=1
Relationship Dialogue Overhaul.esp=1
Wintersun - Faiths of Skyrim.esp=1
DarkEnvoy.esp=1
Disenchant Arch-Mage Robe.esp=1
ColdharbourDaedra.esp=1
Summermyst - Enchantments of Skyrim.esp=1
FNIS.esp=1
BeyondSkyrimMerchant.esp=1
BSmerchantfix.esp=1
My Home Is Your Home.esp=1
PAN_Frea.esp=1
PAN_Initiates.esp=1
Dawnguard Map Markers.esp=1
NeutralHjerim.esp=1
GQJ_DG_vampireamuletfix.esp=1
arvak_replace.esp=1
3DNPC0.esp=1
Lynly Star-Sung.esp=1
FranklyHDImperialArmorsAndWeapons.esp=1
Cuyima 3DNPC - Redone.esp=1
PAN_NPCs_DG.esp=1
PAN_NPCs_DB.esp=1
Serana.esp=1
Serana Dialogue Edit.esp=1
Ordinator - Perks of Skyrim.esp=1
Sacrosanct - Vampires of Skyrim.esp=1
Ordinator - Beyond Skyrim Bruma Patch.esp=1
AnnaBreezehome.esp=1
ProudspiremanorTNF.esp=1
RSChildren.esp=1
RSC 3DNPC Patch.esp=1
RSC_USSEP_AventusFix.esp=1
Babette has Fangs.esp=1
LKVM by Nimee - Part I_ SE.esp=1
MBWSFollowersReplacer.esp=1
Marriable Serana.esp=1
Marriable Serana HF.esp=1
UIExtensions.esp=1
AddItemMenuSE.esp=1
Dress Up Lovers.esp=1
FleshFX.esp=1
PrvtIRoyalArmory.esp=1
Schlongs of Skyrim.esp=1
DBM_RSChildren_Patch.esp=1
Gwelda Vampire.esp=1
ZTH.esp=1
BarenziahQuestMarkers.esp=1
Palaces Castles Enhanced.esp=1
PCE - 3DNPC Patch.esp=1
DBM_PCE_Patch.esp=1
PCE - USSEP Patch.esp=1
PCE - RDO Patch.esp=1
PCE - Royal Armory Patch.esp=1
DBM_ZimsThaneWeapons_Patch.esp=1
ZIA_Ancient Pack.esp=1
PerkPointPotion.esp=1
VampireNoFallDamage.esp=1
Imperious - Races of Skyrim.esp=1
Run For Your Lives.esp=1
QuestsAreInSkyrimUSSEP.esp=1
GetBothRewardsSeries.esp=1
Quest Markers Restored.esp=1
No Vampire Cure on Rumors.esp=1
Thunderchild - Epic Shout Package.esp=1
Severin Manor.esp=1
hjerimtnf.esp=1
VHTNFSSE.esp=1
WaterView.esp=1
UnlimitedBookshelves.esp=1
AKA_LeftHandRings_Patch.esp=1
Hroki Replacer.esp=1
DBM_RoyalArmory_Patch.esp=1
DBM_Vigilant_Patch.esp=1
DBM_Wintersun_Patch.esp=1
DBM_ISC_Patch.esp=1
DBM_AHO_Patch.esp=1
DBM_UnlimitedBookshelves_Patch.esp=1
DBM_WACCF_Patch.esp=1
Immersive Citizens - AI Overhaul.esp=1
ZIA_Daedric Pack.esp=1
PCE - Immersive Citizens AI Overhaul Patch.esp=1
CWR_IC_Patch.esp=1
Bijin_AIO-SV 2018.esp=1
Sum_WACCF_Patch.esp=1
Qw_BeyondSkyrimBruma_USSEP Hotfix Patch.esp=1
Qw_ISC_USSEP Patch.esp=1
Qw_3DNPC_USSEP Patch.esp=1
Qw_BarenziahQuestMarkers_USSEP Patch.esp=1
Qw_WACCF_ISC Patch.esp=1
Differently Ebony.esp=1
Qw_ACE_BSHeartland Patch.esp=1
RSChildren Patch - BS Bruma.esp=1
Qw_WACCF_RSChildren Patch.esp=1
aMidianBorn_ContentAddon.esp=1
CBBE.esp=1
nwsFollowerFramework.esp=1
BonemoldWeapons.esp=1
Sleep Spells.esp=1
Unique Dragon Aspect.esp=1
Crimson Blood Armor.esp=1
PAN_Serana.esp=1
Serana Hood Removal.esp=1
DX Witch Hunter Armor.esp=1
Enchanting Freedom.esp=1
Enchanting Freedom - Summermyst Patch.esp=1
Headtracking.esp=1
buildingmaterialsgodchest.esp=1
LKVM by Nimee - Part II_SE.esp=1
SkyUI_SE.esp=1
UNP Undies.esp=1
SeranaDialogAddon.esp=1
 

If anyone can help me, I'd greatly appreciate it.