TGDIPPicture ignores Bounds in Draw Method

Hello Guys,

i have an Frame with an AdvSmoothTimeLine and an TGDIPPictureContainer on it. I fill the Container in the Frame constructor and Draw the Pics in the DrawTimeLine-Event of the TimeLine. I use the Draw Method of the TGDIPicture to scale and Draw the Pics. All works fine with JPEG Pictures in the Container. 

When i use BMP Files in the TGDIPPictureContainer, the Draw-Method ignores the Bounds for the given TRect.