diff --git a/src/asammdf/gui/widgets/channel_group_info.py b/src/asammdf/gui/widgets/channel_group_info.py
index 90961ff8a..547865c37 100644
--- a/src/asammdf/gui/widgets/channel_group_info.py
+++ b/src/asammdf/gui/widgets/channel_group_info.py
@@ -79,7 +79,8 @@ def _display(self, position):
         record_count = record_end - record_offset
 
         data = b"".join(
-            e[0] for e in self.mdf._load_data(self.group, record_offset=record_offset, record_count=record_count)
+            fragment.data
+            for fragment in self.mdf._load_data(self.group, record_offset=record_offset, record_count=record_count)
         )
 
         data = pd.Series(list(np.frombuffer(data, dtype=f"({self.record_size},)u1")))
diff --git a/src/asammdf/gui/widgets/file.py b/src/asammdf/gui/widgets/file.py
index 8abce53ee..3cb0db7c0 100644
--- a/src/asammdf/gui/widgets/file.py
+++ b/src/asammdf/gui/widgets/file.py
@@ -1268,7 +1268,7 @@ def load_channel_list(self, event=None, file_name=None, manually=False, show_pro
 
             self.functions.update(info.get("functions", {}))
             self.global_variables = f'{self.global_variables}\n{info.get("global_variables", "")}'
-            self.global_variables = '\n'.join([line for line in self.global_variables.splitlines() if line])
+            self.global_variables = "\n".join([line for line in self.global_variables.splitlines() if line])
 
         if channels:
             iterator = QtWidgets.QTreeWidgetItemIterator(self.channels_tree)
diff --git a/src/asammdf/mdf.py b/src/asammdf/mdf.py
index 2f8cae7a7..1ce75b35f 100644
--- a/src/asammdf/mdf.py
+++ b/src/asammdf/mdf.py
@@ -203,6 +203,11 @@ class MDF:
 
         .. versionadded:: 7.0.0
 
+    process_bus_logging (\*\*kwargs) : bool
+        controls if the bus processing of MDF v4 files is done when the file is loaded. Default True
+
+        .. versionadded:: 8.0.0
+
     Examples
     --------
     >>> mdf = MDF(version='3.30') # new MDF object with version 3.30
@@ -2245,6 +2250,11 @@ def concatenate(
 
             use_display_names (False) : bool
 
+            process_bus_logging (True) : bool
+                controls if the bus processing of MDF v4 files is done when the file is loaded. Default True
+
+                .. versionadded:: 8.1.0
+
         Examples
         --------
         >>> conc = MDF.concatenate(
@@ -2646,7 +2656,8 @@ def concatenate(
             first_mdf.close()
 
         try:
-            merged._process_bus_logging()
+            if kwargs.get("process_bus_logging", True):
+                merged._process_bus_logging()
         except:
             pass
 
@@ -2680,6 +2691,11 @@ def stack(
 
             use_display_names (False) : bool
 
+            process_bus_logging (True) : bool
+                controls if the bus processing of MDF v4 files is done when the file is loaded. Default True
+
+                .. versionadded:: 8.1.0
+
         Examples
         --------
         >>> stacked = MDF.stack(
@@ -2834,7 +2850,8 @@ def stack(
                 return TERMINATED
 
         try:
-            stacked._process_bus_logging()
+            if kwargs.get("process_bus_logging", True):
+                stacked._process_bus_logging()
         except:
             pass