diff --git a/src/devices/mixer.cpp b/src/devices/mixer.cpp
index 458c0af04..b8e76a2d1 100644
--- a/src/devices/mixer.cpp
+++ b/src/devices/mixer.cpp
@@ -145,11 +145,11 @@ void Mixer::process_IPMStatusMessage(std::shared_ptr<const Telegram> telegram) {
     // do we have a mixed circuit
     if (ismixed == 2) {
         has_update(telegram->read_value(flowTemp_, 3)); // is * 10
-        has_update(telegram->read_value(flowSetTemp_, 5));
         has_update(telegram->read_value(status_, 2)); // valve status
     }
 
     has_update(telegram->read_bitvalue(pumpStatus_, 1, 0)); // pump is also in unmixed circuits
+    has_update(telegram->read_value(flowSetTemp_, 5));      // flowSettemp is also in unmixed circuits, see #711
 }
 
 // Mixer on a MM10 - 0xAB
diff --git a/src/system.cpp b/src/system.cpp
index c14498f4e..9b92f1c51 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -373,7 +373,7 @@ void System::show_mem(const char * note) {
 
 // send periodic MQTT message with system information
 void System::send_heartbeat() {
-    // don't send heartbeat if WiFi or MQTT is connected
+    // don't send heartbeat if WiFi or MQTT is not connected
     if (!Mqtt::connected()) {
         return;
     }