OIL dilution with 5-year plug-in hybrid outlander

I have just noticed that our oil level is increased. Approx. 8mm above maximum. The engine oil snaps slightly after petrol. Our outlander is Ez. 05.2019 and has 73,000 km down. Short distances (4 – 8 km, single rides) are usually driven purely electrically (EV button activated). Almost every 2nd month also further distances (up to 300 km single ride. From the exhaust comes no smoke (either white, blue, black). Could anyone of you notice the same? The car should this e or next week. Not because of oil dilution, but change to pure BEVs.