In early discussions of DRM Lease functionality, there was a comment stating that when a DRM lease client crashes, the screen should not be blanked. 

More specifically the this should work as follows:

• When a client crashes, the screen should not return to a blank screen.  The screen should keep the last displayed frame of the client
• When a client exits normally, the screen should return to a blank screen.
• When the client resumes, it should be able to continue outputting on the same screen
• After the client crashes, another client can take over the lease (i.e. the lease is not reserved for crashed client)

harunobu.kurokawa, YAMAGUCHINaoto, please let me know if there are any other specifications or restrictions for this feature.