Parts disappear after placing / connecting them. Then cannot click anywhere.

[iRb]

Having an issue when placing parts during construction.  
The part will when placed will disappear and then I cannot click anywhere else.    I've been driving myself mad trying to figure out what mod is causing it. 

Here is a video of someone else having the same issue:   https://imgur.com/a/yJxhC58
 

A.P.U.S. Aerospace Passenger and Utility System (AerospacePassengerandUtilitySystem 0.8)
Advanced Fly-By-Wire (Windows) (AdvancedFlyByWire 1.8.3.7)
Airplane Plus (AirplanePlus 26.5)
ALCOR (ALCOR 0.9.7)
ALCOR Advanced IVA (ALCORIVAPatch 0.9.7)
All Aboard! (AllAboard 1.0.1.1)
Animated Decouplers (AnimatedDecouplers v1.5.0)
AnyRes (AnyRes 1.4.1)
ASET Agency (ASETAgency 1.0)
ASET Avionics (ASETAvionics 2.1)
ASET Props (ASETProps 1.5)
Astrogator (Astrogator v1.0.0)
AT Utils (AT-Utils v1.10.1)
Aviation Lights (AviationLights 1:v4.1.2)
B9 Aerospace - Legacy Parts Pack (B9AerospaceLegacy 1:v6.6.0)
B9 Aerospace Parts Pack (B9 1:v6.6.0)
B9 Aerospace Procedural Wings - Fork (B9-PWings-Fork 3:0.43.0.11)
B9 Aerospace Props (B9-props 1:v6.6.0)
B9 Animation Modules (B9AnimationModules v1.7.0)
B9 Part Switch (B9PartSwitch v2.20.0)
BD Armory Continued (BDArmoryContinued 1:v1.3.4)
BD Railgun (BDRailgun 3.1)
Breaking Ground (BreakingGround-DLC 1.7.1)
Buffalo (Buffalo v2.12.0)
Buffalo Classic Stock Play Mode (Buffalo-PlayMode-ClassicStock v2.12.0)
Bumblebee (Bumblebee 0.6.1)
CA - Mk3 Block II (CAMk3BlockII 1:0.2)
CactEye-2 Orbital Telescope Refocused (CactEyeCommunityRefocused 1.5.2.7)
ClickThrough Blocker (ClickThroughBlocker 1:2.1.10.18)
Community Category Kit (CommunityCategoryKit v112.0.1)
Community Resource Pack (CommunityResourcePack v112.0.1)
Conformal Decals (ConformalDecals 0.2.12)
Connected Living Space (ConnectedLivingSpace v2.0.2.0)
Contract Parser (ContractParser 9.0)
Contracts Window + (ContractsWindowPlus 9.4)
CST-100 Starliner (CST100Starliner v2.1)
Custom Pre Launch Checks (CustomPreLaunchChecks 1.8.1.1)
Daedalus Consortium Megastations Continued (DaedalusConsortiumMegastationsContinued 0.3)
DaMichel's AeroRadial (DAR) (DMTanks-AeroRTG 1:1.1.0.1)
DaMichel's CargoBays (DCB) (DMTanks-CargoBays 1:1.1.0.1)
DaMichel's Fuselage (DMF) (DMTanks-Fuselage 1.1.0.2)
DaMichel's SphericalTanks (DST) (DMTanks-SphericalTanks 1:1.1.0.0)
Deployable Engines Plugin (DeployableEngines 1.3.1)
Distant Object Enhancement /L (DistantObject v2.1.1.11)
Distant Object Enhancement /L default config (DistantObject-default v2.1.1.11)
DMagic Orbital Science (DMagicOrbitalScience 1.4.3)
DMModuleScienceAnimateGeneric (DMagicScienceAnimate v0.23)
Docking Port Alignment Indicator (DockingPortAlignmentIndicator 6.10.0.0)
Dr. Jet's Chop Shop (ChopShop 1:0.11.4.5)
Draggable Navball (DraggableNavball v1.0.1.5)
Dynamic Battery Storage (DynamicBatteryStorage 2:2.2.5.0)
Engine Lighting (EngineLighting 1.5.1)
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)
Extraplanetary Launchpads (ExtraPlanetaryLaunchpads 6.99.3.0)
Feline Utility Rovers (FelineUtilityRovers 1.3.6)
Filter Extensions - Plugin (FilterExtensions 3.2.7)
Firespitter (Firespitter v7.17)
Firespitter Core (FirespitterCore v7.17)
Firespitter Resources config (FirespitterResourcesConfig v7.17)
Future Weapons (FutureParts 3.3)
Harmony 2 (Harmony2 2.2.1.0)
HullcamVDS Continued (HullcamVDSContinued 0.2.2)
Hyper Propulsion Sci-Fi engine pack (HyperPropulsionSciFiEnginePack v0.0.3)
HyperEdit (HyperEdit 1.5.8.0)
Infernal Robotics - Next (InfernalRoboticsNext v3.0.7)
Interstellar Fuel Switch Core (InterstellarFuelSwitch-Core 3.29.4)
Interstellar Redistributable  (InterstellarRedistributable 1.4)
JSI Advanced Transparent Pods (JSIAdvancedTransparentPods V0.1.24.0)
JSIPartUtilities (JSIPartUtilities 0.5.0.5)
K.R.X.  Kerbal Rotor Expansion (KRXKerbalRotorExpansion 0.31.1)
Kerbal Actuators (KerbalActuators v1.8.5)
Kerbal Attachment System (KAS 1.12)
Kerbal Engineer Redux (KerbalEngineerRedux 1.1.9.0)
Kerbal Inventory System (KIS 1.29)
Kerbal Joint Reinforcement - Next (KerbalJointReinforcementNext v4.1.19)
Kerbal Konstructs (KerbalKonstructs v1.8.5.0)
Kerbal Planetary Base Systems (KerbalPlanetaryBaseSystems v1.6.16)
Kerbal Reusability Expansion (SpaceXLegs 2.9.2)
Kerbodyne Plus (KerbodynePlus 1.0752)
Konstruction (Konstruction v112.0.1)
Kopernicus Planetary System Modifier (Kopernicus 2:release-1.12.1-139)
Kronal Vessel Viewer Continued (KVVContinued 0.1.1)
KSP AVC (KSP-AVC 1.4.1.9)
KSP Community Fixes (KSPCommunityFixes 1.23.0)
KSP Recall (KSP-Recall v0.3.0.3)
Making History (MakingHistory-DLC 1.12.1)
Malemute Rover (MalemuteRover v112.0.1)
Mark IV Spaceplane System (MarkIVSpaceplaneSystem 3.2.0)
MechJeb 2 (MechJeb2 2.14.2.0)
MechJeb and Engineer for all! (MechJebForAll 1.3.0.7)
Mk 33 (Mk-33 v1.2.2)
'Mk1 Cockpit' IVA Replacement by ASET (Mk1CockpitIVAReplbyASET 1.1)
Mk2 Stockalike Expansion (Mk2Expansion 2:1.9.1.2)
Mk3 KIS Cargo Containers (Mk3KISCargoContainers 1.0)
Mk3 Shuttle Mid-Deck IVA Refurbished (Mk3ShuttleMidDeckIVARefurbished 0.1.0)
Mk3 Stockalike Expansion (Mk3Expansion 1.6.1.3)
MOAR Station Science (MOARStationScience v2.6.1.3)
ModularFlightIntegrator (ModularFlightIntegrator 1.2.10.0)
Module Manager (ModuleManager 4.2.2)
Moldavite Machines (MoldaviteMachines 1.3)
Near Future Aeronautics (NearFutureAeronautics 2.1.1)
Near Future Construction (NearFutureConstruction 1.3.1)
Near Future Electrical (NearFutureElectrical 1.2.3)
Near Future Electrical Core (NearFutureElectrical-Core 1.2.3)
Near Future IVA Props (NearFutureProps 1:0.7.1)
Near Future Launch Vehicles (NearFutureLaunchVehicles 2.2.0)
Near Future Propulsion (NearFuturePropulsion 1.3.5)
Near Future Solar (NearFutureSolar 1.3.2)
Near Future Solar Core (NearFutureSolar-Core 1.3.2)
Near Future Spacecraft (NearFutureSpacecraft 1.4.3)
Near Future Spacecraft - LFO Engines (NearFutureSpacecraft-OrbitalLFOEngines 1.4.3)
NKD - North Kerbin Dynamics for BDArmory (NorthKerbinDynamics v0.84b)
OrbitalColony (OrbitalColony 1:1.1.0.1)
Parallax (Parallax 2.0.4)
Parallax - Stock Planet Textures (Parallax-StockTextures 2.0.0)
Parallax - Stock Scatter Textures (Parallax-StockScatterTextures 2.0.1)
Patch Manager (PatchManager 0.0.17.6)
PersistentRotation Upgraded (PersistentRotationUpgraded 1.9.1.7)
Photon Sailor (PhotonSailor 1.7.3)
Physics Range Extender  (PhysicsRangeExtender 1.21.0)
Procedural Parts (ProceduralParts v2.4.3)
Progress Parser (ProgressParser 11.0)
'Project Orion' Nuclear Pulse Engine (USI-NuclearRockets v112.0.1)
Pure Electric (PureElectricEngines 1:1.12.1)
RasterPropMonitor (RasterPropMonitor 1:v0.31.9)
RasterPropMonitor Core (RasterPropMonitor-Core 1:v0.31.9)
Retractable Lifting Surface Module (RetractableLiftingSurface 0.2.1.2)
SCANsat (SCANsat v20.4)
Scatterer (Scatterer 3:v0.0838)
Scatterer Default Config (Scatterer-config 3:v0.0838)
Scatterer Sunflare (Scatterer-sunflare 3:v0.0838)
SDHI Strobe-O-Matic Warning Rotator Lights (SDHI-StrobeOMatic v1.0.1)
Shabby (Shabby 0.3.0.0)
Shuttle Lifting Body (ShuttleLiftingBodyCormorantAeronology 1.5.1)
Smart Actuation (SmartActuation 1.1.1)
SmokeScreen - Extended FX Plugin (SmokeScreen 2.8.14.0)
Snacks (Snacks v1.28.0)
SpaceTux Library (SpaceTuxLibrary 0.0.8.4)
SpaceX Landing Legs (SpaceXLandingLegs 1.0.2)
SpaceY Expanded (SpaceY-Expanded 1.4)
SpaceY Heavy Lifters (SpaceY-Lifters 1.17.2)
Starship Landing Legs (StarshipLandingLegs V1.0)
Stational Cunstructs (StationalConstructs 1.8.1)
Stockalike Station Parts Expansion Redux (StationPartsExpansionRedux 2.0.10)
Sum Dum Heavy Industries - Shared Assets (SDHI-SharedAssets 4.0.4)
Tarsier Space Technology with Galaxies Continued... (TarsierSpaceTechnologyWithGalaxies 1:7.13)
Textures Unlimited (TexturesUnlimited 1.5.10.25)
Throttle Controlled Avionics (ThrottleControlledAvionics v3.8.0.1)
Toolbar (Toolbar 1:1.8.0.8)
Toolbar Controller (ToolbarController 1:0.1.9.8)
Transparent Pods (TransparentPods 1:1.2.3.3)
Tundra Exploration - Stockalike Dragon V2 and Falcon 9 (TundraExploration 6.1.0)
TweakScale - Rescale Everything! (TweakScale v2.4.6.18)
TweakScale Redistributable (TweakScale-Redist v2.4.6.18)
Tycho Orbital Shipyards weaponry (TychoWeaponry 0.1)
USI Asteroid Recycling Technologies (USI-ART 1:v112.0.1)
USI Core (USI-Core v112.0.1)
USI Exploration Pack (USI-EXP v112.0.1)
USI Freight Transport Technologies (USI-FTT v112.0.1)
USI Kolonization Systems (MKS/OKS) (UKS 1:v112.0.1)
USI Life Support (USI-LS v112.0.1)
USI Survival Pack (USI-SRV 0.6.3.0)
USI Tools (USITools v112.0.1)
Vessel Viewer Continued (VesselView 2:0.8.8.5)
VesselView-UI-Toolbar (VesselView-UI-Toolbar 1:0.8.8.5)
Waterfall Core (Waterfall 0.9.0)
Wild Blue Tools (WildBlueTools v1.88.1)
WildBlueIndustries Classic Stock Play Mode (WildBlue-PlayMode-ClassicStock v1.88.1)
Zero MiniAVC (ZeroMiniAVC 1:1.1.2.5)
 

Edited November 21, 2022 by 18Watt
Edited by moderation team.

[DeadJohn]

Weird. Try clearing "input locks" using the alt-f12 debug menu when the problem occurs. Maybe something in your install is spamming input locks.

[Lisias]

I think you are getting a NullReferenceException on a internal Editor handler.

Please post your KSP.log after reproducing the problem (please quit KSP or at least go to Main Menu before copying the KSP.log to avoid getting it truncated) on dropbox or something, and I will give a took to see where things are going South for you.