.NET (Core and Framework)

public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> source)
		{
			var remainingSequence = source;

			// set first last element
			var lastElement = remainingSequence.Take(1).First();
			
			while (remainingSequence.Count() > 0)
			{
				Console.WriteLine("Remaining {0}", remainingSequence.Count());
				Console.WriteLine("last Element is {0}", lastElement);
				yield return remainingSequence.TakeWhile(t => t.Equals(lastElement));
				remainingSequence = remainingSequence.SkipWhile(t => t.Equals(lastElement));
				Console.WriteLine("New Remaining {0}", remainingSequence.Count());
				lastElement = remainingSequence.Take(1).FirstOrDefault();
				Console.WriteLine("After assign {0}", remainingSequence.Count());
			}
		}

foreach (var X in valuelist.Split())
			{
				Console.WriteLine("--> " + X.Count());
				Console.ReadKey();				
			}

Linq extension:
1st iteration
Remaining 14
last Element is 1
--> 2    until here, everything looks fine
 New Remaining 12
After assign 14  here is the strange thing, it switches back to my initial remainingSequence when assigning the new 'lastElement'

2nd iteration
Remaining 14
last Element is 0
--> 0
 New Remaining 14
After assign 12

endless circle due to resetting the 
Remaining 12
last Element is 1
--> 0
 New Remaining 12
After assign 14
Remaining 14
last Element is 1
--> 0