diff --git a/electrum/address_synchronizer.py b/electrum/address_synchronizer.py
index 9a8464c98..efbe3552c 100644
--- a/electrum/address_synchronizer.py
+++ b/electrum/address_synchronizer.py
@@ -244,12 +244,13 @@ class AddressSynchronizer(Logger, EventListener):
 
     def get_transaction(self, txid: str) -> Transaction:
         tx = self.db.get_transaction(txid)
-        # add verified tx info
-        tx.deserialize()
-        for txin in tx._inputs:
-            tx_height, tx_pos = self.get_txpos(txin.prevout.txid.hex())
-            txin.block_height = tx_height
-            txin.block_txpos = tx_pos
+        if tx:
+            # add verified tx info
+            tx.deserialize()
+            for txin in tx._inputs:
+                tx_height, tx_pos = self.get_txpos(txin.prevout.txid.hex())
+                txin.block_height = tx_height
+                txin.block_txpos = tx_pos
         return tx
 
     def add_transaction(self, tx: Transaction, *, allow_unrelated=False, is_new=True) -> bool:
diff --git a/electrum/util.py b/electrum/util.py
index ba3738e35..622538074 100644
--- a/electrum/util.py
+++ b/electrum/util.py
@@ -1289,7 +1289,7 @@ class TxMinedInfo(NamedTuple):
 class ShortID(bytes):
 
     def __repr__(self):
-        return f"<ShortID: {format_short_channel_id(self)}>"
+        return f"<ShortID: {format_short_id(self)}>"
 
     def __str__(self):
         return format_short_id(self)
@@ -1314,7 +1314,7 @@ class ShortID(bytes):
         return ShortID.from_components(*components)
 
     @classmethod
-    def normalize(cls, data: Union[None, str, bytes, 'ShortChannelID']) -> Optional['ShortChannelID']:
+    def normalize(cls, data: Union[None, str, bytes, 'ShortID']) -> Optional['ShortID']:
         if isinstance(data, ShortID) or data is None:
             return data
         if isinstance(data, str):