WA on exception?

New joiner trying to understand how submission feedback is working. On the TILESQRS problem
TILESQRS , the dummy code below get a WA response, while I was expecting a TLE or a runtime error depending on the uncommented line.

Any reason why a long running program/exception thrown result in a WA ? Maybe it is the normal behavior, and I should not expect somethign different ?

namespace SomeNS
{
    class Launcher
    {
        static void Main(string[] args)
        {
            throw new System.Exception("Failing");//will be considered as WA
            //System.Threading.Thread.Sleep(System.TimeSpan.FromSeconds(3));//Will be considerd as WA as well
            
        }
    }

}

If it was a classic problem then you must have definitely received the RTE or the TLE verdict. But in case of interactive problems, the verdict depends on the grader also. One possible explanation is that the grader got timed out waiting for your queries. Since it didn’t receive the correct answer, it didn’t write any score on the score file which is why you got WA.