- Please see the attached snapshot showing a blank page.
Enable JPI_PLUGIN2_DEBUG=1 and JPI_PLUGIN2_VERBOSE=true

How reproduce ?

First way
1) Run ensemble in applet mode in Firefox browser on a windows machine.
2) In the terminal window where you receive heart beat , drag the scrollbar to the top and hold it for few seconds and leave it, you will see a series of Exceptions.

Second way
1) Run ensemble in applet mode in Firefox browser on a windows machine.
2) Leave the system to lock itself(not manually lock) [Hit: Change the display idle time in windows control panel]
3) Unlock the machine and you will find the Exceptions trail.

See another attached text file for the Exception log( I have made some amendments to the log console to highlight sections)