diff --git a/electrum/gui/qml/__init__.py b/electrum/gui/qml/__init__.py
index 1957e2aa2..8f7b6689d 100644
--- a/electrum/gui/qml/__init__.py
+++ b/electrum/gui/qml/__init__.py
@@ -59,7 +59,7 @@ class ElectrumGui(BaseElectrumGui, Logger):
         self.logger.info("CWD=%s" % os.getcwd())
         # Uncomment this call to verify objects are being properly
         # GC-ed when windows are closed
-        #network.add_jobs([DebugMem([Abstract_Wallet, SPV, Synchronizer,
+        #plugins.add_jobs([DebugMem([Abstract_Wallet, SPV, Synchronizer,
         #                            ElectrumWindow], interval=5)])
 
         if hasattr(Qt, "AA_ShareOpenGLContexts"):
diff --git a/electrum/gui/qt/__init__.py b/electrum/gui/qt/__init__.py
index dcd5092e9..4a37fb100 100644
--- a/electrum/gui/qt/__init__.py
+++ b/electrum/gui/qt/__init__.py
@@ -147,7 +147,7 @@ class ElectrumGui(BaseElectrumGui, Logger):
         self.logger.info(f"Qt GUI starting up... Qt={QtCore.QT_VERSION_STR}, PyQt={QtCore.PYQT_VERSION_STR}")
         # Uncomment this call to verify objects are being properly
         # GC-ed when windows are closed
-        #network.add_jobs([DebugMem([Abstract_Wallet, SPV, Synchronizer,
+        #plugins.add_jobs([DebugMem([Abstract_Wallet, SPV, Synchronizer,
         #                            ElectrumWindow], interval=5)])
         if hasattr(QtCore.Qt, "AA_ShareOpenGLContexts"):
             QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_ShareOpenGLContexts)
diff --git a/electrum/util.py b/electrum/util.py
index 0a57b68a2..0bad5f510 100644
--- a/electrum/util.py
+++ b/electrum/util.py
@@ -365,7 +365,11 @@ class DebugMem(ThreadJob):
         objmap = defaultdict(list)
         for obj in gc.get_objects():
             for class_ in self.classes:
-                if isinstance(obj, class_):
+                try:
+                    _isinstance = isinstance(obj, class_)
+                except AttributeError:
+                    _isinstance = False
+                if _isinstance:
                     objmap[class_].append(obj)
         for class_, objs in objmap.items():
             self.logger.info(f"{class_.__name__}: {len(objs)}")