So, for almost a year now, I've had issues with horses flying around the Whiterun area. It can happen with the horses in the stables, and also with NPCs passing by on horses. I hadn't seen this in any other areas of the game other than Whiterun.
I recently encountered this issue in Riverwood, with Uthgerd on her horse (making a trip thanks to Immersive Citizens - but note I had this issue long before I had that mod installed).
This is what happens (link to video clip):
https://www.youtube.com/watch?v=2p63dCGKIr4&feature=youtu.be
Note how there are random changes of direction, teleporting/repositioning, and how Uthgerd reappears horseless right at the end of the video.
I haven't messed with the ini files, don't have ENB, and v-sync is on.
Current modlist:
00 Skyrim.esm
01 Update.esm
02 Unofficial Skyrim Patch.esp [Version 2.1.3a]
03 Dawnguard.esm
04 Unofficial Dawnguard Patch.esp [Version 2.1.3]
05 HearthFires.esm
06 Unofficial Hearthfire Patch.esp [Version 2.1.3]
07 Dragonborn.esm
08 Unofficial Dragonborn Patch.esp [Version 2.1.3]
09 Falskaar.esm
0A Wyrmstooth.esp [Version 1.15]
0B More Interactive Items.ESM
0C More Interactive Items [Dawnguard].ESM
0D More Interactive Items [Hearthfire].ESM
0E CompanionArissa.esm
0F HighResTexturePack01.esp
10 HighResTexturePack02.esp
11 HighResTexturePack03.esp
12 Unofficial High Resolution Patch.esp [Version 1.1.9]
13 Cutting Room Floor.esp [Version 1.1.5]
14 College of Winterhold Entry Requirements.esp
15 East Empire Strongbox Logo.esp
16 PuffsFollowers.esp
17 ChaurusLights.esp
18 Footprints.esp
19 Chesko_LevelUp.esp
1A Chesko_MorrowindPotionNames.esp
1B Traps Are Dangerous.esp
1C Better Dynamic Snow.esp [Version 2.4]
1D Cutting Room Floor - Choice is Yours Patch.esp
1E Chesko_LoreBasedLoadingScreens.esp
1F Daggerfall-Inspired Sanguine.esp
20 DragonShoutVoice.esp
21 Duke Patricks - Skyrim Friction Fix.esp [Version 1.1]
22 BlackHorseCourier.esp
23 dD - Realistic Ragdoll Force - Realistic.esp
24 mintylightningmod.esp
25 Piratelords Loot Adjustments.esp
26 Castle Volkihar Rebuilt.esp [Version 1.0.1]
27 wizDynamicThings.esp
28 EFPwizardry.esp
29 Hide Those Futile Quests.esp
2A No Empty Tag on Containers.esp
2B ClassicLevelUp.esp
2C iHUD.esp
2D WondersofWeather.esp
2E abotFiresHurt.esp
2F JumpMakeNoise.esp
30 KnightPaladinGeleborFollower.esp
31 Lore Weapon Expansion.esp [Version 1.3]
32 LPSleep.esp
33 No HUD Key Prompts.esp
34 NoPsychicLockKnowledge.esp
35 Extended UI.esp [Version 1.2.0d]
36 One With Nature - DG+DB.esp
37 RandomClappingAnimations.esp
38 Readable Spell Tomes.esp
39 SkaalKidAetaCoat.esp
3A SkyUI.esp
3B SleepTight.esp
3C TheChoiceIsYours_Dragonborn.esp
3D SMIM-DragonbornTernFix.esp
3E SMIM-FurnitureChestSnowFix.esp
3F UIExtensions.esp
40 VariedCouriers.esp
41 WetandCold.esp
42 WetandCold - Ashes.esp
43 When Vampires Attack.esp [Version 2.0.5]
44 Unbelievable Grass Two.esp
45 CollegeOfWinterholdImmersive.esp
46 NotSoFast-MageGuild.esp
47 3DNPC.esp [Version 3.09.9]
48 Immersive Citizens - AI Overhaul.esp
49 FCO - Follower Commentary Overhaul.esp
4A Piratelords Loot Adjustments - Falskaar.esp
4B SkyFalls + SkyMills + DG + DB + FS + WT.esp
4C Grass Clipping Fix.esp
4D Bring Out Your Dead.esp [Version 2.0.4]
4E Legionettes.esp
4F DiversePriests.esp
50 DiversePriests_BringOutYourDeadPatch.esp
51 BetterQuestObjectives.esp [Version 1.5.5]
52 Book Covers Skyrim.esp
53 Lore Weapon Expansion - Goldbrand.esp [Version 1.1]
54 Skyrim Immersive Creatures.esp [Version v6.5.2a]
55 Lore Weapon Expansion - Daedric Crescent.esp [Version 1.0]
56 Containers Weight Cap - Legendary.esp
57 Guard Dialogue Overhaul.esp
58 Holidays.esp
59 ETaC - Complete Holidays Patch.esp
5A Skyrim Immersive Creatures - DLC2.esp [Version v6.5.2a]
5B hearthfireextended.esp
5C PrinceandPauper.esp
5D ImprovedHearthfireLighting.esp
5E RBB Long Boats.esp
5F Oblivion Gates v3 without Markers.esp
60 Inconsequential NPCs.esp
61 VendorSaleDelay-Gone.esp
62 Lore Weapon Expansion - Relics of the Crusader.esp [Version 1.0]
63 RBB Long Boats - Wyrmstooth.esp
64 RBB Row Boats - Wyrmstooth.esp
65 SkyrimToyStory.esp
66 ABCsforBarbarians - Hearthfire Patch.esp
67 SMIM-FarmhouseFlickeringFix.esp
68 TheChoiceIsYours.esp [Version 1.4]
69 Point The Way.esp [Version 1.0.6]
6A Run For Your Lives.esp [Version 2.0.5]
6B TempleOfMolagBal.esp
6C Volundr.esp
6D CFTO.esp
6E Inigo.esp
6F Darkwater Crossing.esp [Version 1.0.3]
70 ShieldOfMagnus.esp
71 HothFollower.esp
72 Odvar.esp
73 RBB Long Boats - Falskaar.esp
74 RBB Row Boats.esp
75 KRUZIIK.ESP
76 MissingTotemPuzzlePillars.esp
77 SMIM-ShackRoofFixes.esp
78 Ducks and Swans.esp
79 Woodcutter's Wife.esp
7A Ivarstead.esp [Version 1.0]
7B Book Covers Skyrim - Lost Library.esp [Version 1.7]
7C ABCsforBarbarians.esp
7D Valerica_Follower.esp
7E Goodnight Mundus.esp
7F SMIM-ShackRoofFixesDragonborn.esp
80 Kynesgrove.esp [Version 1.1.4]
81 Storefront.esp [Version 1.0.6]
82 OrcChild.esp
83 Bee Hives.esp [Version 1.0]
84 Thieves Guild Requirements.esp
85 TradeRoutes.esp [Version 2.0]
86 TimingIsEverything.esp
87 ItBeatsForHer.esp
88 ChaurusPheromones.esp
89 Immersive Citizens - CRF patch.esp
8A OrcHearthfire.esp
8B Advanced Shrines.esp
8C MHdunSky001.esp
8D MzarkWonders.esp
8E CWIDawnDragonPatch.esp
8F Gehenoth.esp
90 LPBards.esp
91 VorynDrelethBooks.esp
92 MHufb001.esp
93 PP_OgmundsTomb.esp
94 ClosedBorderGates.esp
95 Gildergreen Regrown.esp [Version 1.2.6]
96 Lokir's House.esp
97 TheChoiceIsYours_Dawnguard.esp
98 TradeBarter.esp
99 Unique Uniques.esp [Version 1.8]
9A Wind Destruction.esp
9B DeadlySpellImpacts.esp
9C Water Destruction.esp
9D LoreFriendlySpells.esp
9E PP_WindcallerPass.esp
9F ReadAndLearnFromBooksBCS.esp
A0 HFE-CFTO-Patch.esp
A1 RUSTIC SOULGEMS - Unsorted.esp
A2 True Scholar.esp
A3 Inconsequential NPCs - CRF Compatibility Patch.esp
A4 HFE-CRF-Patch.esp
A5 PP_EngelmannRest.esp
A6 RBB - Row Boats - Hearthfire Hotfix.esp
A7 BetterQuestObjectives-CRFPatch.esp
A8 CreatureSizeVariants.esp
A9 Alternate Start - Live Another Life.esp [Version 3.0.4]
AA BetterQuestObjectives-AlternateStartPatch.esp
AB Bashed Patch, 0.esp
Is anyone else encountering this issue, and is there anything that can be done to fix it?