Reported the jack2 xrun bug, now we stop telling users

libs/ardour/session_transport.cc

@@ -1807,10 +1807,10 @@ Session::xrun_recovery ()
 		}
 	}
 	else if (exporting ()) {
-		assert (realtime_export ());
 		/* apparently JACK2 can cause xruns during freewheeling
 		 * (and not just one when switching from/to freewheeling):
 		 * https://discourse.ardour.org/t/there-have-been-dropouts-during-realtime-export/105930
+		 * https://github.com/jackaudio/jack2/issues/758
 		 */
 		if (realtime_export ()) {
 			++_export_xruns;