Ibiza 6P/6J MJ 2017 1.2 TSI sometimes does not start immediately

Hello together, I could use your help. It’s about my wife’s Ibiza. Is a 1.2 TSI with 90 hp; EA211 with timing belt and MKB CJZC. The car got a new battery a year ago, is driven daily. 12tKM/anno; tend to have more short distance. The oil is changed annually after 12,000 KM. The car is moved very carefully and currently has 120,000 KM on it. He has it in rare cases that he does not start right away. Then he orgs, one interrupts and he is there. nn immediately there. Now the days he had it again. Over night it froze and in the morning he did not want to go straight. I imagine that he had already had it and that he had the key a little too casually and briefly turned over. Can it be that the immobilizer does not release the ignition in such cases and he therefore orgles? I can not say exactly what it is about. He does not nail/snatch, runs silky soft and is economical and quick. He only has this well-known A second, when he’s racing to build up the oil pressure. Maybe someone knows it. Thank you very much.