TextInput loses focus in pluginType dock

I have created a dock plugin with a TextInput for user input. When I initially open the plugin, I can freely type in the text box. However, when I click anywhere outside the plugin dock area, such as on a note in the score, I cannot focus back on the TextInput. The cursor will not show up. If however, I minimize MuseScore or click outside the entire MuseScore window, onto say my internet browser, then I can return back to the plugin and click on the TextInput. Also, if I undock the plugin, I can click outside the plugin and return focus back to the TextInput without any probelm.

How do I return focus back to the TextInput after clicking outside my docked plugin? Is this a QML thing or a MuseScore issue?

Here is a modification of the panel plugin you may use to test this issue yourself:

import QtQuick 2.0
import MuseScore 1.0

MuseScore {
  menuPath:   "Plugins.panelTextInput"
  version:  "1.0"
  description: "This demo plugin creates a GUI panel with a TextInput."
  requiresScore: false

  pluginType: "dock"
  dockArea:   "left"

  onRun:  console.log("hello panel");

  Rectangle {
    width:  150
    height: 75

    border.width: 1

    TextInput {
      id: textInput1

      anchors.fill: parent
      text: "Type Here"
    }
  }
}

Thank you for your help.