--- a/mod_csi_muc_priorities/mod_csi_muc_priorities.lua	Mon Apr 01 13:19:29 2019 +0200
+++ b/mod_csi_muc_priorities/mod_csi_muc_priorities.lua	Mon Apr 01 13:19:47 2019 +0200
@@ -31,6 +31,9 @@
 						return true;
 					end
 				end
+			elseif session.directed and session.directed[stanza.attr.from] then
+				-- fallback if no mod_track_muc_joins
+				return true;
 			end
 		end
 	end