fixes

src/ImageSharp/Memory/Allocators/UniformUnmanagedMemoryPoolMemoryAllocator.cs

@@ -106,6 +106,8 @@ namespace SixLabors.ImageSharp.Memory
                     {
                         buffer.Clear();
                     }
+
+                    return buffer;
                 }
             }
 

src/ImageSharp/Memory/DiscontiguousBuffers/MemoryGroup{T}.cs

@@ -200,7 +200,7 @@ namespace SixLabors.ImageSharp.Memory
                 return null;
             }
 
-            return new Owned(pool, arrays, bufferLength, totalLengthInElements, sizeOfLastBuffer);
+            return new Owned(pool, arrays, bufferLength, totalLengthInElements, sizeOfLastBuffer, options);
         }
 
         public static MemoryGroup<T> Wrap(params Memory<T>[] source)

tests/ImageSharp.Tests/Memory/Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs

@@ -329,8 +329,8 @@ namespace SixLabors.ImageSharp.Tests.Memory.Allocators
         [InlineData(1200)]
         public void MemoryOwnerFinalizer_ReturnsToPool(int length)
         {
-            RunTest(length.ToString());
-            // RemoteExecutor.Invoke(RunTest, length.ToString()).Dispose();
+            // RunTest(length.ToString());
+            RemoteExecutor.Invoke(RunTest, length.ToString()).Dispose();
 
             static void RunTest(string lengthStr)
             {