Hi everyone, first time that ever happens to me. I guess it might come from a mod. You can clearly see what I mean in this picture :
Again, I already am in mirror symetry, here is the list of my mods :
Aircraft Carrier Accessories (AircraftCarrierAccessories 1:1.9.1)
ASET Consolidated Agency (ASETAgency 2.0)
ASET Consolidated Props Pack (ASETProps 2.0.1)
AT Utils (AT-Utils v1.10.1)
AtmosphereAutopilot (Fly-By-Wire) (AtmosphereAutopilot v1.6.0)
Automated Aerial Refueling System (AutomatedAerialRefueling 1:1.9.1)
B9 Aerospace Parts Pack (B9 1:v6.6.0)
B9 Aerospace Procedural Wings - Fork (B9-PWings-Fork 3:0.44.0)
B9 Aerospace Props (B9-props 1:v6.6.0)
B9 Animation Modules (B9AnimationModules v1.7.0)
B9 Part Switch (B9PartSwitch v2.20.0)
BahamutoD Animation Modules (BDAnimationModules 1:v0.6.7.1)
BD Armory Continued (BDArmoryContinued 1:v1.3.4)
Celestial Body Science Editor (CelestialBodyScienceEditor 12.0)
ClickThrough Blocker (ClickThroughBlocker 1:2.1.10.21)
ColdWarAerospace (ColdWarAerospace 0.6)
Community Resource Pack (CommunityResourcePack v112.0.1)
Community Tech Tree (CommunityTechTree 1:3.4.4)
Configurable Containers (ConfigurableContainers 2.6.2.1)
Custom Pre Launch Checks (CustomPreLaunchChecks 1.8.1.1)
Deployable Engines Plugin (DeployableEngines 1.3.1)
Environmental Visual Enhancements - Stock Planet Config files (EnvironmentalVisualEnhancements-HR 2:EVE-1.2.2-1)
Environmental Visual Enhancements Redux (EnvironmentalVisualEnhancements 3:1.11.7.1)
Firespitter Core (FirespitterCore v7.17)
Firespitter Resources config (FirespitterResourcesConfig v7.17)
Hangar (Hangar 3.6.2.2)
Harmony 2 (Harmony2 2.2.1.0)
HyperEdit (HyperEdit 1.5.8.0)
Infernal Robotics - Next (InfernalRoboticsNext v3.1.9)
Interstellar Fuel Switch Core (InterstellarFuelSwitch-Core 3.30.0)
Kerbal Actuators (KerbalActuators v1.8.5)
Kerbal Aircraft Expansion (KerbalAircraftExpansion 4:2.8.1.0)
Kerbal Cities Pack (KerbalCitiesPack 1:0.3.0)
Kerbal Engineer Redux (KerbalEngineerRedux 1.1.9.0)
Kerbal Foundries2 (KerbalFoundriesContinued 2.4.8.18)
Kerbal Joint Reinforcement - Next (KerbalJointReinforcementNext v4.1.19)
Kerbal Konstructs (KerbalKonstructs v1.8.6.0)
KSP Community Fixes (KSPCommunityFixes 1.24.6)
KSP Recall (KSP-Recall v0.3.0.10)
KSP Wheel (KSPWheel 1:0.16.14.33)
KW Rocketry Rebalanced (KWRocketryRebalanced 3.2.7.2)
Lithobrake Exploration Technologies (LET) (formerly LETech) (LithobrakeExplorationTechnologies 0.5.0.0-adoption)
Magpie Mods (MagpieMods 1.5.9)
Mark IV Spaceplane System (MarkIVSpaceplaneSystem 3.2.0)
Mk3 Hypersonic Systems (Mk3HypersonicSystems 1:1.2)
Modular Rocket Systems (ModularRocketSystem 1.13.2)
Module Manager (ModuleManager 4.2.2)
Near Future Aeronautics (NearFutureAeronautics 2.1.1)
Near Future IVA Props (NearFutureProps 1:0.7.1)
Nice MKseries Body (NiceMKseriesBody V3.9)
OPT Reconfig (OPTReconfig 3.4.1)
OPT Spaceplane (Legacy) (OPTSpacePlaneParts 1:3.1.2)
OPT Spaceplane Continued (OPTSpacePlaneMain 1:3.1.1)
Patch Manager (PatchManager 0.0.17.6)
Physics Range Extender (PhysicsRangeExtender 1.21.0)
Probes Before Crew [PBC] (ProbesBeforeCrew 2.93)
Procedural Parts (ProceduralParts v2.4.3)
RasterPropMonitor (RasterPropMonitor 1:v0.31.11.1)
RasterPropMonitor Core (RasterPropMonitor-Core 1:v0.31.11.1)
Scatterer (Scatterer 3:v0.0838)
Scatterer Default Config (Scatterer-config 3:v0.0838)
Scatterer Sunflare (Scatterer-sunflare 3:v0.0838)
Simple Adjustable Fairings - KW Rocketry Pack (SimpleAdjustableFairings-KWRocketry v1.4.0)
Simple Adjustable Fairings - Plugin (SimpleAdjustableFairings v1.12.0)
SmokeScreen - Extended FX Plugin (SmokeScreen 2.8.14.0)
SpaceTux Library (SpaceTuxLibrary 0.0.8.5)
SpaceY Expanded (SpaceY-Expanded 1.4)
SpaceY Heavy Lifters (SYL) by NecroBones (SpaceY-Lifters 1:1.9.99.0-adoption)
Textures Unlimited (TexturesUnlimited 1.5.10.25)
The Janitor's Closet (JanitorsCloset 0.3.7.9)
Toolbar Controller (ToolbarController 1:0.1.9.9)
TweakScale - Rescale Everything! (TweakScale v2.4.6.23)
TweakScale Redistributable (TweakScale-Redist v2.4.6.23)
VesselMover Continued (VesselMoverContinued v1.12.0)
If you have any Idea, i'll take it, thanks a lot !