--- a/plugins/mod_pubsub/mod_pubsub.lua	Mon Mar 21 10:06:48 2022 +0000
+++ b/plugins/mod_pubsub/mod_pubsub.lua	Mon Mar 21 12:36:20 2022 +0000
@@ -84,7 +84,7 @@
 			end
 			if not expose_publisher then
 				item.attr.publisher = nil;
-			elseif not item.attr.publisher then
+			elseif not item.attr.publisher and actor ~= true then
 				item.attr.publisher = service.config.normalize_jid(actor);
 			end
 		end