diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index fe6174219..3f4090a68 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -2598,7 +2598,7 @@ void MachineObject::reset_update_time()
 {
     BOOST_LOG_TRIVIAL(trace) << "reset reset_update_time, dev_id =" << dev_id;
     last_update_time = std::chrono::system_clock::now();
-    subscribe_counter = 3;
+    subscribe_counter = SUBSCRIBE_RETRY_COUNT;
 }
 
 void MachineObject::reset()
@@ -2622,7 +2622,7 @@ void MachineObject::reset()
     nozzle_diameter = 0.0f;
     network_wired = false;
     dev_connection_name = "";
-    subscribe_counter = 3;
+    subscribe_counter = SUBSCRIBE_RETRY_COUNT;
     job_id_ = "";
     m_plate_index = -1;
 
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index fa89c828b..58d7c525f 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -40,6 +40,7 @@
 #define VIRTUAL_TRAY_ID         254
 #define START_SEQ_ID            20000
 #define END_SEQ_ID              30000
+#define SUBSCRIBE_RETRY_COUNT   5
 
 inline int correct_filament_temperature(int filament_temp)
 {
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 79bc08aff..205ee1d3a 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -2450,7 +2450,7 @@ void GUI_App::on_start_subscribe_again(std::string dev_id)
             BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": dev_id=" << obj->dev_id;
         }
     });
-    start_subscribe_timer->Start(4000, wxTIMER_ONE_SHOT);
+    start_subscribe_timer->Start(5000, wxTIMER_ONE_SHOT);
 }
 
 std::string GUI_App::get_local_models_path()
diff --git a/src/slic3r/GUI/Monitor.cpp b/src/slic3r/GUI/Monitor.cpp
index 4e1670f46..e2a6f3e0d 100644
--- a/src/slic3r/GUI/Monitor.cpp
+++ b/src/slic3r/GUI/Monitor.cpp
@@ -481,8 +481,6 @@ bool MonitorPanel::Show(bool show)
 
     if (obj && !obj->dev_id.empty()) {
         select_machine(obj->dev_id);
-    } else {
-        select_machine("");
     }
 
     return wxPanel::Show(show);