Have had experience of both DI Evinrudes and Optimax.
I know of a 225 Rude, it siezed simply because the oil level rather than oil pressure switch in the remote oil tank, stuck in its normal position, simple electrical fault like this told the ECU everything was ok no fault codes for low oil and the motor under load siezed, also was the 150 which failed running the reccommended ficht ram oil,or xd oil which has replaced it, not the premimum plus stuff.
I have also seen a few posts here about supposed Potimax compressor failures.
This is simply not accurate, what does happen is the 2 stroke oil feed to the overhead compressor can simply detach, not good I know from movement/vibration etc.
This is simply resolved by a cabletie/ clip around the oil feed in.
If you do some research on www.boatsetup.com
you will find out all about the upgrade to prevent the injector fires on some of the Ficht Ram models