Image distortion when navigating through a wsi. #31

Hello. I am new to openslide and i am working on a project in which i want to view a wsi on panels and frames, just like in Demo.java that comes with openslide-java distribution. The issue that i encountered is that, when i zoom in an image and navigate to the right, previously unviewed regions of the image appear distorted. The problem only occurs when i move the image to the right, any other direction works ok. If i zoom out or in while the distorted region is on sight, the distortion disappears. Has anyone encountered this type of problem before?

I am running openslide on an Ubuntu 16.04 LTS Virtual Machine (VirtualBox) with openjdk 8. I am attaching a runtime picture of Demo.java.