GUI framerate drop in Chrome

Hello there. I'm having some problems with the GUI as the title states. In some cases in Google Chrome the GUI framerate drops severely. It takes approximately 0.5 - 1 sec for the GUI button to switch its onHover style. This bug is completely random and I havent found a proper way to reproduce it every time. All I can say is that it happens only in Chrome on an iMac after I've started the game. If I click play and then from the 1st level go back (exit game) to mainMenu scene the framerate usually fixes, but not always.

Let me give you a little input on how I handle GUI.

I have a GUIBase class which has a Show() method. I have custom classes that inherit from GUIBase class and have their Show() methods overridden, respectively. Inside each custom class' Show() I have some GUI code.

I have a main object which has its GUI elements, a few buttons to be exact. Those buttons change state of a property called state which is then passed to a switch/case which determines which gui object to create and call its .Show() method.

I've tested inside editor, safari on iMac and IE, FF, Chrome and editor on windows. On windows it works flawlessly. Same goes for editor and Safari on a mac. I'm experiencing problems only with Chrome.

Any ideas?

Here is a fraction of the code.

GameManager:

 switch (state)
     {
         case "Login":
         LoginForm loginForm = new LoginForm();
         loginForm.Show();
         break;
             
         // REGISTER        
         case "Register":
         RegisterForm registerForm = new RegisterForm();
         registerForm.Show();
         break;
             
         // PROFILE
         case "Profile":
         ProfileForm profileForm = new ProfileForm();
         profileForm.Show();                
         break;
     }

And a fraction of the code from one of the classes. They are basically the same, they only carry different layouts of the GUI.

LoginForm:

 public override void Show()
 {
     Rect loginRegisterRect = new Rect(0, 0, Screen.width, Screen.height);
     
     if (loginRegisterRect.Contains(Event.current.mousePosition))
     {    
         GameManager.IsGUIButtonOver = true;
        }
     else
     {
         GameManager.IsGUIButtonOver = false;
     }

     GUILayout.BeginArea(loginRegisterRect, GameManager.CustomSkin.GetStyle("RegisterLoginBackground"));
     //LOGIN
     GUILayout.BeginVertical();
             
     GUILayout.Label("Login", "LabelLoginRegister");
     GUILayout.Label("Enter your details", "LabelExplanation");
     // labeli i input field
     GUILayout.BeginHorizontal();
     GUILayout.Label("E-mail"); GameManager.logOnModel.UserName = GUILayout.TextField(GameManager.logOnModel.UserName, 50);
     GUILayout.EndHorizontal();
     GUILayout.BeginHorizontal();
     GUILayout.Label("Password"); GameManager.logOnModel.Password = GUILayout.PasswordField(GameManager.logOnModel.Password, "*"[0], 50);
     GUILayout.EndHorizontal();
                 
     GameManager.logOnModel.RememberMe = GUILayout.Toggle(GameManager.logOnModel.RememberMe, "Remember me");
     GUILayout.BeginHorizontal();
     if (GUILayout.Button("", "ButtonCancel"))
     {
         GameManager.state = "Hide";
     }            
     if (GUILayout.Button("", "ButtonOk"))
     {
         Debug.Log("Login...");
         if(GameManager.logOnModel.IsValid)
         {
             GameManager.StartCoroutine(GameManager.LogIn());
             GameManager.logOnModel.Password = string.Empty; // Clear password from the Login Form
             GameManager.state = "Hide";
         }
         else
         {    
             GameManager.showErrorLabel = true;
         }
     }
     GUILayout.EndHorizontal();
     
     
     if(GameManager.showErrorLabel)
         GUILayout.Label("Error");
 
     GUILayout.EndVertical();
     GUILayout.EndArea();
 }

Maybe I'm doing something wrong. Or maybe its just the chrome unity plugin thats messed up. I can't really tell. I was hoping someone might have a solution.