Play stuck with hands behind back

[godwhatamIdoingwithmylife]

So, my character suddenly started having this: 

as their default idle pose. They still move fine and their walking animation looks normal. Loading an earlier save worked, but I had to go back quite a ways and would like to know what the cause is and if there's a way to avoid it. 

 

load order:

Spoiler

  0  0     Skyrim.esm
  1  1     Update.esm
  2  2     Dawnguard.esm
  3  3     HearthFires.esm
  4  4     Dragonborn.esm
  5  5     Unofficial Skyrim Special Edition Patch.esp
  6  6     Schlongs of Skyrim - Core.esm
  7  7     SexLab.esm
  8  8     CreatureFramework.esm
254 FE   0 RealisticWaterTwo - Resources.esm
  9  9     ApachiiHair.esm
254 FE   1 Expressive Facegen Morphs.esl
 10  a     Devious Devices - Assets.esm
 11  b     Campfire.esm
 12  c     RaceCompatibility.esm
 13  d     battlenymphs.esm
 14  e     SexLabAroused.esm
           PSQ PlayerSuccubusQuest.esm
254 FE   2 SAS.esl
 15  f     Heels Sound.esm
 16 10     ZaZAnimationPack.esm
 17 11     FISS.esp
 18 12     ApachiiHairFemales.esm
 19 13     Devious Devices - Integration.esm
 20 14     Devious Devices - Expansion.esm
 21 15     Devious Devices - Contraptions.esm
 22 16     SkyUI_SE.esp
 23 17     SMIM-SE-Merged-All.esp
 24 18     Immersive Wenches.esp
254 FE   3 MfgFix.esp
 25 19     RaceMenu.esp
 26 1a     RaceMenuPlugin.esp
           beltfastenedquivers.esp
 27 1b     SOSRaceMenu.esp
 28 1c     XPMSE.esp
 29 1d     CBBE.esp
 30 1e     RaceMenuMorphsCBBE.esp
 31 1f     12FemaleBrows.esp
 32 20     SOS - Smurf Average Addon.esp
 33 21     SexlabAmmoUnequip.esp
 34 22     SexLabMatchMaker.esp
 35 23     SLAnimLoader.esp
 36 24     NibblesAnimObjects.esp
 37 25     Summermyst - Enchantments of Skyrim.esp
 38 26     Cutting Room Floor.esp
 39 27     Skyrim Immersive Creatures Special Edition.esp
 40 28     RLO - Exteriors.esp
 41 29     Remodeled Armor - Vanilla Replacer.esp
 42 2a     Joy of Perspective.esp
 43 2b     SexLabTools.esp
 44 2c     SLAL_SHanimAnimObj.esp
 45 2d     AnubAnimObj.esp
 46 2e     NCK30Obj.esp
 47 2f     PsycheAnimationObjects.esp
254 FE   4 SLAL_AnimationByBakaFactory.esp
 48 30     SLAL_AnimationsByLeito.esp
 49 31     SLAL_K4Anims.esp
 50 32     SLALAnimObj.esp
 51 33     UIExtensions.esp
 52 34     RaceMenuHH.esp
 53 35     RaceCompatibilityUSKPOverride.esp
254 FE   5 AutoHideAmmo.esp
 54 36     FemaleOutfitReplacer.esp
254 FE   6 Cicera - Female Cicero Dialogue Edit.esp
 55 37     Forgotten Wenches.esp
254 FE   7 SINful CBP.esp
 56 38     AddItemMenuSE.esp
 57 39     FNISSexyMove.esp
 58 3a     RutahTattooPack SE.esp
 59 3b     zzEstrus.esp
 60 3c     AmazingFollowerTweaks.esp
 61 3d     BrajornLoadingNSFW.esp
 62 3e     icepenguinworldmapclassic.esp
 63 3f     iLuvLoading.esp
 64 40     dD - Enhanced Blood Main.esp
 65 41     EBT - IC PATCH.esp
 66 42     Footprints.esp
 67 43     UnreadBooksGlow.esp
 68 44     imp_helm_legend.esp
 69 45     DHuntress.esp
 70 46     FlameAtronachArmor.esp
 71 47     FullBootForKKSA.esp
 72 48     Judgment Wenches.esp
 73 49     KKSDGWeightSliderFix.esp
 74 4a     KKSDrBWeightFix.esp
 75 4b     C5Kev's Stalhrim Stiffy Armor 3BA.esp
 76 4c     Bathing in Skyrim - Main.esp
 77 4d     SLACS.esp
 78 4e     SLSO.esp
 79 4f     Spank That Ass.esp
254 FE   8 BeautifulDraugr.esp
 80 50     GR Inari EarsTails SMP.esp
 81 51     DanceForMe.esp
 82 52     SexLab Aroused Creatures.esp
 83 53     WetandCold.esp
 84 54     MoreNastyCritters.esp
 85 55     hydra_slavegirls.esp
 86 56     Hothtrooper44_ArmorCompilation.esp
 87 57     MrissiTailOfTroubles.esp
254 FE   9 BakaFactoryABC.esp
 88 58     Animal_SOS.esp
 89 59     LABikiniSSE.esp
 90 5a     JoP - Immersive Armors Patch.esp
 91 5b     Immersive Weapons.esp
 92 5c     animal_mansion.esp
 93 5d     YurianaWench.esp
 94 5e     Run For Your Lives.esp
 95 5f     SexLab Beastess.esp
 96 60     Schlongs of Skyrim.esp
 97 61     Hothtrooper44_Armor_Ecksstra.esp
 98 62     BeautifulFalmer.esp
 99 63     FemaleGuardsBase.esp
100 64     EstrusChaurus.esp
101 65     MiasLair.esp
254 FE   a CiceroFemaleSE.esp
254 FE   b CiceroFemaleConversion.esp
           Hothtrooper44_ArmorCompilation_CCOR_Patch.esp
102 66     TERAArmorsSSE.esp
103 67     HearthCraft.esp
104 68     Laura's Bondage Shop.esp
105 69     HornyCreatures.esp
106 6a     MistySkye.esp
107 6b     Hunterborn.esp
108 6c     SexLab-AmorousAdventures.esp
109 6d     SofiaFollower.esp
110 6e     Skyrim Flora Overhaul.esp
111 6f     KNM_Mour.esp
112 70     TheAmazingWorldOfBikiniArmor.esp
113 71     SOS - Shop.esp
114 72     TAWoBA - JOP Patch.esp
115 73     [SunJeong] Ninirim Collection.esp
116 74     SLDragons.esp
117 75     House Map Markers Legendary.esp
118 76     My Home Is Your Home.esp
119 77     RosaFollower.esp
120 78     Apocalypse - Magic of Skyrim.esp
121 79     Nerida.esp
122 7a     Succubus Heart.esp
123 7b     MistysHairSalon.esp
124 7c     LustmordVampireArmor.esp
125 7d     ERF - Succubus.esp
126 7e     Lolidia.esp
254 FE   c Bathing in Skyrim - Hunterborn.esp
127 7f     Public Executions.esp
128 80     AP Skyrim SE.esp
           ERF - Succubus - PSQ Addon.esp
129 81     SexLab Extra Voices.esp
130 82     JaxonzEnhGrab.esp
131 83     Daedric Bitchs.esp
132 84     el_Brows.esp
133 85     Elysia.esp
134 86     GK-2b.esp
135 87     saLa_Hairs.esp
136 88     TheEyesOfBeauty.esp
137 89     Moolgogi Follower Ahri.esp
138 8a     Shino_School_Uniform.esp
139 8b     [COCO]wedding_2B.esp
254 FE   d Minou Aradia Lace Dress.esp
140 8c     VanillaArgoniansRedux.esp
141 8d     CZM_SilverThroatFollower.esp
142 8e     Dovakini.esp
143 8f     PeroPeroArmorPackSE.esp
144 90     PeroPeroArmorPack - JoP Patch.esp
145 91     [COCO]KDA_Ahri_Full.esp
254 FE   e Deflection - Dynamic Blocking Combat Overhaul.esp
146 92     UltimateDragons.esp
147 93     Janessa Half Argonian Companion.esp
148 94     RLO - Effects.esp
149 95     AcquisitiveSoulGemMultithreaded.esp
150 96     Eldritch Magic Weapon Enchantments.esp
151 97     dc-untamed-000.esp
152 98     dc-untamed-100-stfu-spriggan.esp
153 99     dc-untamed-100-stfu-wolf.esp
154 9a     SimpleOutfitManager.esp
155 9b     SexLabRandomSex.esp
254 FE   f [TheMilkDrinker] YoRHa 2B Attire.esp
156 9c     HentaiCreatures.esp
157 9d     Toccata.esp
254 FE  10 [COCO] Pinup Cheongsam.esp
254 FE  11 [COCO] RONIN.esp
254 FE  12 [COCO]LaceBody.esp
254 FE  13 [COCO]Lingerie.esp
254 FE  14 [COCO]Raikou.esp
254 FE  15 [COCO]Student_Uniform.esp
158 9e     FNIS.esp
159 9f     FNISspells.esp
254 FE  16 [COCO] Asuka suit.esp
254 FE  17 [COCO] Lady Gladiator.esp
160 a0     [COCO]Deliciously_Bride_Full_CBBE SE.esp
161 a1     [COCO]JoanOfArc_Full_CBBE SE.esp
           CCOR_Campfire_Patch.esp
162 a2     Hunterborn - Campfire Patch.esp
           Immersive Weapons_CCOR_Patch.esp
163 a3     KKFur.esp
           imp_helm_legend_WACCF_AMB_Patch.esp
254 FE  18 MCMHelper.esp
254 FE  19 TrueDirectionalMovement.esp
164 a4     Abduction.esp
165 a5     SexLab TDF Aggressive Prostitution.esp
166 a6     SexLabDefeat.esp
167 a7     SexLabHorribleHarassment.esp
168 a8     Sleep for Credit.esp
169 a9     SPS - Sexlab Position Selector.esp
170 aa     TDF_AP_IndHookersPlug_In.esp
171 ab     VO_Succubus_Rape_Spell.esp
172 ac     Devious Devices For Him.esp
173 ad     Devious Devices - BRRF.esp
254 FE  1a Devious Devices SE patch.esp
174 ae     SlaveTats.esp
175 af     Imperious - Races of Skyrim.esp
176 b0     Ordinator - Perks of Skyrim.esp
           CCOR_Ordinator.esp
177 b1     Immersive Citizens - AI Overhaul.esp
178 b2     Relationship Dialogue Overhaul.esp
179 b3     RDO - AFT v1.66 Patch.esp
254 FE  1b Immersive Wenches -Immersive Citizens AI Overhaul Patch-.esp
180 b4     Convenient Horses.esp
181 b5     Andromeda - Unique Standing Stones of Skyrim.esp
182 b6     Realistic AI Detection 2 SE Lite.esp
183 b7     Alternate Start - Live Another Life.esp
184 b8     RLO - Interiors.esp
185 b9     RLO - CRF Patch.esp
186 ba     RLO - IC Patch.esp
187 bb     RLO - Illuminated Spells.esp
188 bc     RLO - VIS Patch.esp
189 bd     RealisticWaterTwo.esp
254 FE  1c Bathing in SSE - RWT Patch.esp
254 FE  1d Bathing in Skyrim SE - RWT Watercolor Patch.esp