What the hell happened? I was playing for like 3 hours inside this place.
I just tested a save just after entering the cave and that one works being able to go back out.
I tried a save about 2 saves before the last save, ignoring a sleeping bandit I normally killed, and that one didn't work.
Spoiler
Active Mod Files:00 Oblivion.esm01 Jog_X_Mod.esm02 All Natural Base.esm [Version 1.0]03 Francesco's Leveled Creatures-Items Mod.esm [Version 4.5bSI]04 Francesco's Optional New Items Add-On.esm [Version 4.5bSI]05 Francesco's Optional New Creatures Add-On.esm [Version 4.5bSI]06 Cobl Main.esm [Version 1.72]07 Qarls_Harvest.esm08 CyrodiilUpgradeResourcePack.esm09 Better Cities Resources.esm0A BetterMusicSystem.esm0B CURP_Controller.esm0C Progress.esm [Version 2.2]0D HorseCombatMaster.esm0E Unofficial Oblivion Patch.esp [Version 3.3.1]0F Oblivion Citadel Door Fix.esp10 DLCShiveringIsles.esp11 Unofficial Shivering Isles Patch.esp [Version 1.4.0]++ RedBag - Fog.esp12 All Natural.esp [Version 1.0]13 All Natural - SI.esp [Version 1.0]14 Immersive Interiors.esp [Version 0.7]15 Immersive Interiors - Lights Addon.esp [Version 0.7]++ Symphony of Violence.esp16 AmbientTownSounds.esp17 Distant Chapel Bells.esp18 Diverse Voices.esp [Version 0.1a]19 All Natural - Real Lights.esp [Version 1.0]1A Cities Alive At Night.esp1B CampfireBehavior.esp [Version 3.0]1C WindowLightingSystem.esp1D 300_Lore_Dialogue_Updated.esp1E BookTrackerOBSE.esp1F ClocksOfCyrodiil.esp20 Chapel Tithe.esp++ Cyrodilic Brandy.esp21 DarNifiedUI Config Addon.esp22 Fishing in Cyrodiil.esp23 Inebriation.esp++ Item interchange - Extraction.esp [Version 0.78]24 kuerteeSittableRocks.esp25 P1DseeYouSleep.esp26 Portable Campsite.esp++ P1DseeYouSleep - Portable Campsite.esp27 Purge Cell Buffers - Loading.esp [Version 1.0.0]28 Q - More and Moldy Ingredients v1.1.esp29 Qarls_Harvest.esp2A Qarls_Harvest addon.esp2B SoT_Holiday.esp2C Willful Resistance.esp [Version 4.0]2D Wyverex - Deployable Traps.esp2E Enhanced Economy.esp [Version 4.3.1]2F Crowded Roads Revisited.esp [Version 1.1]30 Crowded Roads Revisited_ChorrolCheydinhal_5.esp31 Crowded Roads Revisited_GoldRoad_10.esp32 Crowded Roads Revisited_GreenRoad_10.esp33 Crowded Roads Revisited_YellowRoad_10.esp34 PTRoamingNPCs.esp35 FF_Real_Thirst.esp36 Choices and Consequences.esp [Version 2.1]37 Duke Patricks - Friendship Ring For Companion Detection.esp [Version 1.8]38 Map Marker Overhaul.esp [Version 3.6]39 Map Marker Overhaul - SI additions.esp [Version 3.5]3A Improved Hotkeys_Extended.esp [Version 1.1]3B DLCHorseArmor.esp3C DLCHorseArmor - Unofficial Patch.esp [Version 1.0.5]3D DLCOrrery.esp3E DLCOrrery - Unofficial Patch.esp [Version 1.0.3]3F DLCVileLair.esp40 DLCVileLair - Unofficial Patch.esp [Version 1.0.5]41 P1DseeYouSleep - DLCVileLair.esp42 DLCMehrunesRazor.esp43 DLCMehrunesRazor - Unofficial Patch.esp [Version 1.0.4]44 DLCSpellTomes.esp++ DLCSpellTomes - Unofficial Patch.esp [Version 1.0.1]++ MaleBodyReplacerV4.esp45 ACCCGR SI.esp++ CM_Better Wine.esp++ FineWeapons.esp++ RustyItems.esp46 WarriorBandages_V2.0.esp47 Thieves Arsenal.esp++ Thieves_Arsenal_Patch_033010.esp48 DLCThievesDen.esp49 DLCThievesDen - Unofficial Patch.esp [Version 1.0.5]4A DLCThievesDen - Unofficial Patch - SSSB.esp [Version 1.0.4]4B Francesco's Optional Files 1.esp4C Francesco's Optional Files 2.esp4D Francesco's Optional Files 4.esp4E Cobl Glue.esp [Version 1.72]4F Cobl Si.esp [Version 1.63]50 FF_Real_Thirst, Cobl.esp++ Cobl Tweaks.esp [Version 1.44]51 Bob's Armory Oblivion.esp52 OBSE-Storms & Sound SI.esp53 Creatures Alive v1.3.esp54 kuerteeWanderingEncounters.esp55 TIE.esp [Version 1.37]56 TIE+Frans NPC Inventory.esp [Version 1.0]57 Lock Bash Omega.esp [Version 1.5]58 Enhanced Quest Roleplaying.esp [Version 2.03]59 cyrodiil transportation network 1.3 wz.esp5A Duke Patricks - Bottle Shoot Archery Practice.esp5B Extended Imperial City Version 1.0.esp5C FuseSnailRacing.esp5D Kragenir's Death Quest.esp5E KDQ - Rural Line Additions.esp5F Corpse_Kvatch.esp60 LetThePeopleDrink.esp [Version 2.5]61 KragenirsDeathQuest-LetThePeopleDrink patch.esp62 Region Revive - Lake Rumare.esp63 TheElderCouncil.esp64 TheElderCouncil_TempleOfTheOne.esp65 TEC_4ERA_Dialog_Filter.esp66 thievery.esp67 thievery - EE patch.esp [Version 4.2]68 Travelers Inns.esp69 VaultsofCyrodiil.esp6A Window Entrances 1.0.esp6B za_bankmod.esp6C DLCBattlehornCastle.esp6D DLCBattlehornCastle - Unofficial Patch.esp [Version 1.0.4]6E BattlehornCastleEnhanced.esp6F Lynges_Thieves_Highway-10256.esp70 DLCFrostcrag.esp71 DLCFrostcrag - Unofficial Patch.esp [Version 1.0.4]72 Knights.esp73 Knights - Unofficial Patch.esp [Version 1.0.9]74 SM Plugin Refurbish(Merged).esp [Version 1.30]75 Choices and Consequences - SM Plugin Refurbish - Orrery.esp [Version 2.0]76 AFK_Weye.esp [Version 2.1.COBL]77 Rumare-AFK_Weye Patch.esp [Version 2.0]78 ElsweyrAnequina.esp79 road+bridges.esp [Version 4.5.7]7A Feldscar.esp [Version 1.0.4]7B Vergayun.esp [Version 1.0.5]7C Faregyl.esp [Version 1.0.10]7D Faregyl+Anequina Patch.esp7E xuldarkforest.esp [Version 1.0.5]7F xulStendarrValley.esp [Version 1.2.2]80 xulTheHeath.esp81 XulEntiusGorge.esp82 xulFallenleafEverglade.esp [Version 1.3.1]83 xulColovianHighlands_EV.esp [Version 1.2.1]84 xulChorrolHinterland.esp [Version 1.2.2]85 xulBeachesOfCyrodiilLostCoast.esp [Version 1.6.4]86 KragenirsDeathQuest-LostCoast patch.esp87 xulBravilBarrowfields.esp [Version 1.3.2]88 xulLushWoodlands.esp [Version 1.3]89 xulAncientYews.esp [Version 1.4.3]8A xulAncientRedwoods.esp [Version 1.6]8B xulCloudtopMountains.esp [Version 1.0.3]8C KragenirsDeathQuest-CloudtopMountains patch.esp8D xulArriusCreek.esp [Version 1.1.3]8E xulPatch_AY_AC.esp [Version 1.1]8F xulRollingHills_EV.esp [Version 1.3.2]90 KragenirsDeathQuest-RollingHills patch.esp91 xulPantherRiver.esp92 xulRiverEthe.esp [Version 1.0.2]93 xulBrenaRiverRavine.esp [Version 1.1]94 xulImperialIsle.esp [Version 1.6.5]95 Fuses Snail Racing Unique Landscapes Imperial Isle patch.esp96 RegionReviveLakeRumare-ImperialIsle patch.esp [Version 1.3.3]97 xulBlackwoodForest.esp [Version 1.1.0]98 xulCheydinhalFalls.esp [Version 1.0.1]99 xulAspenWood.esp [Version 1.0.2]9A xulSkingradOutskirts.esp [Version 1.0.1]9B xulSnowdale.esp [Version 1.0]9C NRB4+UL-II+LtPD Patch.esp [Version 3.0.1]9D bartholm.esp9E bartholm - EE patch.esp [Version 4.2]9F RR - LTPDPatch.espA0 NRB4+RR Patch.esp [Version 2.1]A1 Harvest [Flora].esp [Version 3.0.0]++ Harvest [Flora] - Shivering Isles.esp [Version 3.0.0]++ Harvest [Flora] - DLCVileLair.esp [Version 3.0.0]A2 Harvest [Flora] - DLCFrostcrag.esp [Version 3.0.0]A3 DecoratorAssistant with OBSE v1.1.espA4 DropLitTorchOBSE.esp [Version 2.4]A5 DS Storage Sacks.esp [Version 1.21]A6 Dungeon Actors Have Torches 1.6 CT.espA7 Exterior Actors Have Torches 1.3 CT.espA8 GP_Lockpicks.esp [Version 1.5]++ Hurt Me Bad Traps.espA9 ImprovedSoulgems.esp [Version 1.11]AA kuerteeInventoryIsABackpack.espAB P1DkeyChain.esp [Version 5.00]AC PersuasionOverhaul.esp [Version 1.43]AD ReneerNPCNameMod.espAE RenCorpseMod.espAF kuerteeGoldIsAnInventoryItem.espB0 Salmo the Baker, Cobl.esp [Version 3.08]B1 SetsunaDummyTraining.espB2 talkwithyourhands2.espB3 Toggleable Quantity Prompt.esp [Version 3.1.1]B4 kuerteeAlternativesToDeathAndReload.espB5 Enhanced Economy - House prices.esp [Version 1.0]B6 Roleplaying Dialogues.espB7 Alternate Start Revamped.espB8 RealisticFatigue.espB9 RealisticHealth.espBA Real Injury.espBB RealisticForceMedium.espBC ReneerKeyLockMod.espBD RealSleepExtended.esp [Version 2.5]BE Duke Patricks - Basic Hypothermia.esp [Version 3.1]BF Duke Patricks - Nosferatu Class Vampires.esp [Version y]C0 RefScope.esp [Version 2.0.2]C1 Syc_AtHomeAlchemy.espC2 RshAlchemy.espC3 Realistic Sneak for NPCs.esp [Version 1.04]C4 StealthOverhaul.espC5 ZumbsLockpickingMod - OBSE.espC6 ZumbsLockpickingMod - Hide Difficulty Addon.espC7 RenGuardOverhaul.espC8 sycSHOUT.esp [Version 1.02]C9 kuerteeClothingMatters.espCA Enhanced Grabbing.esp [Version 0.5]CB Duke Patricks - Double Arrow Nock Shot.esp [Version 1.5.1a]CC Deadly Reflex 5 - Timed Block with no damage or durability changes.espCD DeadlyReflex 5 - Combat Moves.espCE kuerteeNPCsYield.espCF Duke Patricks - Near Miss Magic And Arrows Alert The Target.esp [Version 7.1]D0 Duke Patricks - Actors Can Miss Now.espD1 MM_AlchemyPotions.espD2 BFG's Enhanced Armory.espD3 Intelligence Overhaul.espD4 nGCD.esp++ nGCD Skeleton Key.espD5 ProgressGSD.esp [Version 2.0]D6 ProgressMBSP.esp [Version 2.0]D7 ProgressSBSP.esp [Version 1.0]D8 ProgressRBSP.esp [Version 1.0]D9 ProgressRacial.espDA ProgressArmorer.esp [Version 1.0]DB immersive_caves_auto.esp** Let There Be Darkness - Cyrodiil + SI.esp** Let There Be Darkness - Knights.esp** Let There Be Darkness - Mehrunes Razor.esp** Let There Be Darkness - Thieves Den.esp** Let There Be Darkness - The Elder Council.esp** Let There Be Darkness - Thievery.esp** Let There Be Darkness - Elsweyr.esp** Let There Be Darkness - UL Colovian Highlands.esp** Let There Be Darkness - UL Lost Coast.esp** Let There Be Darkness - UL Brena.esp** Let There Be Darkness - UL Blackwood Forest.esp++ Item interchange - Placement.esp [Version 0.78]++ Item interchange - Placement for Frostcrag.esp [Version 0.78]++ Item interchange - Option, Ingredients in Bulk.esp [Version 0.78]DC Stat Restore.esp++ Cobl Races - Balanced.esp [Version 1.52]DD MM_TrainingCost2.espDE Really Immersive Messages.espDF Visual Enchantments LessFire.esp** Enhanced Economy - Soulgems.esp [Version 4.2.2]E0 Real Hunger, Cobl.esp [Version 1.6.1]E1 MagicDefence.espE2 ExperienceBasedTraining.esp++ All Natural - SI Settlements NIW Support.espE3 Region_Revive_-_Lake_Rumare_FuseSnailRacing_Patch.esp++ All Natural - Bravil Mages Fix.esp** NRB4 Standard Road Record.esp++ Cobl Filter Late MERGE ONLY.esp [Version 1.53]E4 Cobl Silent Equip Misc.esp [Version 01]** All Natural - Indoor Weather Filter For Mods.esp [Version 1.0]E5 Duke Patricks - Combat Archery.esp [Version 3.2]++ Duke Patricks - BASIC Script Effect Silencer.espE6 LandMagicPatch.espE7 Bashed Patch, 0.espE8 Colored Map for Elsweyr 1.1.espE9 kuerteeCleanUp.espEA Oblivion Graphics Extender Support.esp [Version 0.2]