An incredible (apology for sarcasm) cockpit fight broke out between the pilot and the co-pilot in the cockpit on a flight to Geneva-Paris in June, reported by the airline official. The pilot and co-pilot wrangled right after take-off and ended up hitting one another and grabbing each other by the collar. A cabin crew member had to sit in the cockpit throughout the flight.
Such incidents are not uncommon these days. Airlines are suffering such issues frequently and suspending every time is no good solution. There are various courses on CRM (Crew Resource Management) that pilots undergo at different stages of their career but still soft-skills are not easy to be taught.