ASP.Net Core Returning from action filter

Question

I need to apply a filter to the request. I created a subclass of ActionFilterAttribute with overrided OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next). I have a bit sophisticated logic inside the filter and in some cases I must stop the running of the filter and return default action result (as if there were no filter). If I return in the filter, workflow seems to stop completely, no action result returns. I tried to await next() or call base.OnActionExecutionAsync(...), but that didn't work. How can I implement returning from filter? I have something like this:

    public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
    {
        //some logic

        if (questionnaireId == Guid.Empty)
        {
            //here I need to let the  mvc action run normally
            return;//it doesn't work
        } else {
            //some logic..
        }            
    }

Answer 1

for returning default result add await base.OnActionExecutionAsync(context, next);

public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
    //some logic

    if (questionnaireId == Guid.Empty)
        await base.OnActionExecutionAsync(context, next);
    else {
        //some logic..
    }
}