fix inverse kinematics target handler

src/client/characters.luau

@@ -134,18 +134,26 @@ function module.create(player: Player, model: Model): types.Character?
  }
  character.kinematics[child.Name] = kinematic
 
- local function handle_target(instance: Instance)
- if instance:IsA("Attachment") then
+ local connection: RBXScriptConnection?
+ local function handle_target(instance: Instance?)
+ if instance and instance:IsA("Attachment") then
  kinematic.control_target = instance
  kinematic.control_target_identity = child:GetAttribute("offset")
+
+ if connection then
+ connection:Disconnect()
+ connection = nil
+ -- TODO: remove reference from connections table
+ end
  end
  end
 
  local target = child.Target
  if target then
  handle_target(target)
  else
- table.insert(connections, child:GetPropertyChangedSignal("Target"):Once(handle_target))
+ connection = child:GetPropertyChangedSignal("Target"):Connect(handle_target)
+ table.insert(connections, connection :: RBXScriptConnection)
  end
  elseif child:IsA("Motor6D") and child.Name == "Root" then
  character.waist_motor = child