better logging

synapse/handlers/room_member.py

@@ -217,10 +217,15 @@ class RoomMemberHandler(BaseHandler):
                 requester.user,
             )
             if not is_requester_admin:
-                if (
-                    self.hs.config.block_non_admin_invites or
-                    not self.spam_checker.user_may_invite(requester.user)
-                ):
+                if self.hs.config.block_non_admin_invites:
+                    logger.debug(
+                        "Blocking invite: user is not admin and non-admin "
+                        "invites disabled"
+                    )
+                    block_invite = True
+
+                if not self.spam_checker.user_may_invite(requester.user):
+                    logger.debug("Blocking invite due to spam checker")
                     block_invite = True
 
             if block_invite: