[Richard]

My first approach would be to find the sensor, and clean the connector with contact cleaner. I would also pull the connectors from both sides of the DDEC computer, located passenger side of engine between air compressor and starter. I think it's an 8 mm socket to loosen the holding screw for the connectors. Clean them up and carefully reconnect.

You could change the sensor, but erratic readings hint at bad connection. https://www.youtube.com/watch?v=yt9J1bqtF2o

I am guessing at this next part. When the DDEC sees the low oil pressure it derates the engine and turns off the cruise control. Because it is transient, the derate cures itself, but the cruise control must be turned back on.

So, was it about 1:30 when the cruise kicked off?

I think you can set up a min/max graph on any of the VMS parameters to automatically record what the oil pressure is doing.