Animated control freezes when sizing parent form

Hello, I am making a circular progress control. I use BufferedGraphics for backbuffering and I have the ControlStyles.AllPaintingInWmPaint and ControlStyles.UserPaint flags set. I have the control placed in a test form and constantly animate the control with a timer. The problem is when I re-size the form, the controls progress animation freezes or slows down.