diff --git a/src/js/msp.js b/src/js/msp.js
index eaaa88cd98..9a600231e7 100644
--- a/src/js/msp.js
+++ b/src/js/msp.js
@@ -308,7 +308,8 @@ const MSP = {
         return bufferOut;
     },
     send_message(code, data, callback_sent, callback_msp, doCallbackOnError) {
-        const connected = isWeb ? serial.connected : serial.connectionId;
+        const connected = isWeb() ? serial.connected : serial.connectionId;
+
         if (code === undefined || !connected || CONFIGURATOR.virtualMode) {
             if (callback_msp) {
                 callback_msp();
@@ -325,12 +326,6 @@ const MSP = {
             }
         }
 
-        if (isWeb() && (code === undefined || !serial.connectionInfo)) {
-          console.log('ERROR: code undefined or no connectionId');
-          return false;
-        }
-
-
         const bufferOut = code <= 254 ? this.encode_message_v1(code, data) : this.encode_message_v2(code, data);
 
         const obj = {
diff --git a/src/js/serial_backend.js b/src/js/serial_backend.js
index 2c71a62b5f..a7f2d06326 100644
--- a/src/js/serial_backend.js
+++ b/src/js/serial_backend.js
@@ -803,7 +803,7 @@ export function reinitializeConnection(callback) {
     const reconnect = setInterval(waitforSerial, 100);
 
     function waitforSerial() {
-        if (connectionTimestamp !== previousTimeStamp && CONFIGURATOR.connectionValid) {
+        if ((connectionTimestamp !== previousTimeStamp && CONFIGURATOR.connectionValid) || GUI.active_tab === 'firmware_flasher') {
             console.log(`Serial connection available after ${attempts / 10} seconds`);
             clearInterval(reconnect);
             gui_log(i18n.getMessage('deviceReady'));
diff --git a/src/js/tabs/firmware_flasher.js b/src/js/tabs/firmware_flasher.js
index 95bcd17846..d3f409561a 100644
--- a/src/js/tabs/firmware_flasher.js
+++ b/src/js/tabs/firmware_flasher.js
@@ -1241,7 +1241,7 @@ firmware_flasher.verifyBoard = function() {
     const self = this;
 
     if (!self.isSerialPortAvailable()) {
-        gui_log(i18n.getMessage('firmwareFlasherNoValidPort'));
+        // return silently as port-picker will trigger again when port becomes available
         return;
     }
 
@@ -1474,6 +1474,9 @@ firmware_flasher.backupConfig = function (callback) {
                     clearInterval(disconnect);
                     // Allow auto-detect after CLI reset
                     self.allowBoardDetection = true;
+                    if (callback) {
+                        callback();
+                    }
                 }
                 count++;
             }, 100);