Technical Engine stopping.

[ZaphodB]

And thinking a bit further on this, perhaps move the gear-lever about and clutch pedal while stationary with the engine running and see if you can replicate the error. Nothing to lose and you might at least rule something in or out.

Precisely what I suggested in post 13

 

[Mike1alike]

The crankshaft positioning sensor could be responsible for this. Check it or just replace it with a new one.