A ScrollPane contains a grid of Panes, each of which contains a small Canvas. When the number of Panes reaches 750 or so, the ScrollPane may fail to update its content. Occasionally it will show bits and pieces from the open windows of other applications. The memory setting for the test code is set at -Xmx2000m.

Typically error message in Exception trace: ERROR: unexpected fbo is bound! Expected 1, but found 4

java.lang.NullPointerException
at com.sun.javafx.sg.prism.NGCanvas$RenderBuf.validate(NGCanvas.java:202)
at com.sun.javafx.sg.prism.NGCanvas.initCanvas(NGCanvas.java:615)
at com.sun.javafx.sg.prism.NGCanvas.renderContent(NGCanvas.java:578)

NOTE: the Exception trace may vary.