Update 1.5 includes:

• Addition of the Ferrari 488 Challenge car, and liveries from the 2017 Ferrari Challenge series. This is the latest Ferrari to feature in Maranello’s single-marque championship, and the most powerful car in the series’ 25-year history.  
• Addition of two new layouts to the Porsche Leipzig on-road circuit.
• Corrected a small number of turbo and suspension issues on various cars.
• Resolved an issue where some drivers would appear stuck on track during qualification or race session.
• Resolved an issue where the end of race results would display incorrectly.
• Resolved multiple ghost loading issues in time trial.
• Polished the Online Reputation calculations, including tweaks for when players retire due to excess damage.
• Corrected an occasional issue of players being taken to the wrong lobby if the host set up a new lobby whilst the old one was populated.
• Mechanical failures no longer include aerodynamic damage.
• Various improvements to the AI at a number of tracks and conditions.
• Solved an issue in career when, under certain circumstances, the standings would not display correctly.
• Multiple other miscellaneous fixes and optimisations.