The event object always returns null

[B6692]

The event object always returns null. For example in your code example for Blazor, the event defined as public event WeatherForecastDelegate OnWeatherForecastChanged; the event OnWeatherForecastChanged always returns null and the code breaks saying "System.NullReferenceException: 'Object reference not set to an instance of an object.'". This is only happening now. It used to work well before.