Issue with EditorWindow

Hello,
I have this one issue and I don't know what's causing it.
When I press on a particular button within my window, which opens a specific section, I make my editor window non-resizable. So I set the min and max window size to the current window size. Then after I exit that section, by pressing some exit button for example. I set the min size to the default minSize which is (100,100) and the max size to the default maxSize which is (4000,4000).

But the problem is that after I make my window non-resizable, I am unable to resize my window even when I set the min and max back to default.

I don't know if this makes any difference, but I am using the Utility editor window (ScriptableObject).

Code (CSharp):

1. [MenuItem("Window/My Window")]
2.         public static void Open()
3.         {
4.             var window = ScriptableObject.CreateInstance(typeof(Main)) as Main;
5.             window.titleContent = new GUIContent("My Window");
6.             window.ShowUtility();
7.         }

Can someone give me some advice on what am I doing wrong here? Thank you