I know nothing about this event.
However, while recently doing a flight test program on a DA-42, I had an engine problem, so I flew it for help. I discussed the problem with the mechanic, and during this discussion, he pointed out a few of the characteristics of the Thielert which would allow a sudden stop situation to occur. They were soberingly simple.
There are many cases where I would want the failure to fail to a running condition, even if engine control, or condition were reduced. The notion that any one of a number of simple failures could cause the engine to stop instantly puts the occupants, aircraft, and the engine in much greater peril.
When the Thielerts work, they're wonderful. When they do not, it seems much worse that the much maligned Lycontinentals... I'll be interested to read the report on this one....
But, I sure like diesel.....