JJ
This is caused by one (or more) DU sending corrupted data back to the DMC or another DU. This corrupted data is not recognised by the system and thus causes a hardware reset....hence the blank screens. Recovery, if the system does not auto-recover, is (as I suspect you already know!) to turn off all the screens and reset then sequentially one by one until the duff unit is isolated.
Not looking forward to this one I must say, but AI claim they have a fix ready now. Interesting to see how long it takes to be installed.