ASP.NET Core using IOptionsMonitor<T> throwing exception in a different thread

Question

In my web application, I have a custom configuration file which I want to monitor for changes and update the application settings immediately. So I am using IOptionsMonitor<T> to get this done. It works well.

As per the documentation the method that gets called when configuration file changed is wired up like below.

var data = _serviceProvider.GetRequiredService<IOptionsMonitor<MySettings>>();
data.OnChange(OnReaderSettingOptionsChanged);

Within the OnReaderSettingOptionsChanged() method, I do some validations and there is a need to throw an exception on an edge case so that application shouldn't continue.

The problem is when I throw the exception, I expect to see a error on browser (dev mode with details or normal error otherwise). But it's not showing because according to this exception gets fired in another thread.

So, is there another way for me to get this across to browser?