TableListAttribute drawing extra blank column titled InternalOnInspectorGUI

[Cicaeda Forest]

public class TestResult : SerializedScriptableObject {

    [TableColumnWidth(90)] public string testName;
    [TableColumnWidth(60, Resizable = false)] public float avgFPS;
    [TableColumnWidth(60, Resizable = false)] public double totalGC;
    [TableColumnWidth(300)] public Dictionary<string, double> functionResults;
    [TableColumnWidth(150)] public List<string> comments;

}