The Scotty Kilmer video is worth your attention.
Note the reference to the Toyota dual injection system, indirect and direct injection on the same engine.
Toyota employ both conventional indirect injection into the inlet manifold where the fuel sprays the inlet valves washing them clean of carbon buildup, , and also direct injection into the cylinder for power and economy.
The ECU must be switching to and from indirect to direct injection to suit the driving conditions of the car, the system of Toyota gives the benefit of , indirect to clean the inlets, direct for economy.
Do Honda use a dual system? I am suspecting not.
Note oil dilution, the engine needs work , driving with the engine oil at full working temperature , to burn off the petrol in the oil, Americans are notorious for short trips in their cars, 250 yards to the shop, Walk? No I'll take the car. Is this the cold oil diluting condition Honda refers to?
The software fix, what are the details?