An update to the Aviation Herald entry on this incident says:
"Portugals "Gabinete de Prevencao e Investigacao de Acidentes com Aeronaves" (GPIAA Aviation Accident Branch) told The Aviation Herald on Aug 21st, that they are not investigating the occurrence."
NOT investigating the occurrence? Can't understand why not; I'm presuming the GPIAA works under the same rules as the AAIB and the AAIB certainly would be, particularly given allegations that the aircraft may have flown another sector following the incident.