Random.Next eventually only returns zero

See https://stackoverflow.com/questions/4613693/random-next-sometimes-returns-same-number-in-separate-threads and https://csharpindepth.com/Articles/Random

The solution is to either switch to a round-robin mechanism or develop a thread-safe randomizer. Another possible solution that I am not to fond of is to detect that zero is being returned consecutively and re-instantiate the random instance.