diff --git a/mautrix_telegram/abstract_user.py b/mautrix_telegram/abstract_user.py
index 8f2e4cd3..1a423891 100644
--- a/mautrix_telegram/abstract_user.py
+++ b/mautrix_telegram/abstract_user.py
@@ -598,6 +598,7 @@ class AbstractUser(ABC):
             self.log.debug("Updating channel info with data fetched by Telethon")
             await portal.update_info(self, chan)
             await portal.invite_to_matrix(self.mxid)
+            # TODO create portal?
 
     async def update_message(self, original_update: UpdateMessage) -> None:
         update, sender, portal = await self.get_message_details(original_update)
diff --git a/mautrix_telegram/portal.py b/mautrix_telegram/portal.py
index b1440a11..85af29a8 100644
--- a/mautrix_telegram/portal.py
+++ b/mautrix_telegram/portal.py
@@ -1046,7 +1046,7 @@ class Portal(DBPortal, BasePortal):
                     await self.main_intent.kick_user(self.mxid, puppet.mxid, kick_message)
                 except MForbidden as e:
                     self.log.warning(f"Failed to kick {puppet.mxid}: {e}")
-        elif not await self.az.state_store.is_joined(self.mxid, puppet.intent_for(self).mxid):
+        elif await self.az.state_store.is_joined(self.mxid, puppet.intent_for(self).mxid):
             await puppet.intent_for(self).leave_room(self.mxid, extra_content=puppet_extra_content)
         if user:
             await user.unregister_portal(*self.tgid_full)