To my surprise, memory leaks from JUCE!
List from the Plugin Host:
*** Leaked objects detected: 1 instance(s) of class WindowsDirectWriteTypeface
*** Leaked objects detected: 1 instance(s) of class Typeface
*** Leaked objects detected: 84 instance(s) of class RectangleList
*** Leaked objects detected: 1 instance(s) of class AffineTransform