FS-3337 --resolve indeed, should be ok

src/mod/applications/mod_conference/mod_conference.c

@@ -1498,6 +1498,7 @@ static void *SWITCH_THREAD_FUNC conference_thread_run(switch_thread_t *thread, v
 		if (!switch_test_flag(imember, MFLAG_NOCHANNEL)) {
 			channel = switch_core_session_get_channel(imember->session);
 
+			if (!switch_false(switch_channel_get_variable(channel, "hangup_after_conference"))) {
 				/* add this little bit to preserve the bridge cause code in case of an early media call that */
 				/* never answers */
 				if (switch_test_flag(conference, CFLAG_ANSWERED)) {
@@ -1507,6 +1508,7 @@ static void *SWITCH_THREAD_FUNC conference_thread_run(switch_thread_t *thread, v
 					switch_channel_hangup(channel, conference->bridge_hangup_cause);
 				}
 			}
+		}
 
 		switch_clear_flag_locked(imember, MFLAG_RUNNING);
 	}