fix batchsampler does not work correctly

Author: yyh

src/lightning/pytorch/utilities/data.py

@@ -349,7 +349,14 @@ def _is_dataloader_shuffled(dataloader: object) -> bool:
     if not hasattr(dataloader, "sampler"):
         # shuffling is enabled via a sampler. No sampler, no shuffling
         return False
-    sampler = dataloader.sampler
+    
+    batch_sampler = dataloader.batch_sampler
+    if batch_sampler is not None:
+        # batchsize == 1 case:
+        sampler = batch_sampler.sampler
+    else:
+        sampler = dataloader.sampler
+        
     if isinstance(sampler, SequentialSampler):
         return False
     return isinstance(sampler, RandomSampler)