[palosanto]

The stamps look perfectly fine on my Samsung Tab S4. Can you take a screenshot of what it looks like on your device? I'm not sure why it's behaving oddly for you at the moment. Perhaps there is a setting that is different between our devices. Did you make sure that no color is selected for the stamp? If you have a color selected, the pixel blending could be causing some undesired effects because your images have a white background. Just tap the color field and select "No Color".

Mike

I apologize.  Yes there a color assigned to the stamps.  I selected no-color and everything is fine.  I went crazy for about 2 hours trying all sorts of things ......  
Thanks!
Juan