diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38ac7b77..dce82107 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@
   - [#268](https://github.com/xmrig/xmrig-amd/pull/268) [#270](https://github.com/xmrig/xmrig-amd/pull/270) [#271](https://github.com/xmrig/xmrig-amd/pull/271) [#273](https://github.com/xmrig/xmrig-amd/pull/273) [#274](https://github.com/xmrig/xmrig-amd/pull/274) [#1171](https://github.com/xmrig/xmrig/pull/1171) Added RandomX support for OpenCL, thanks [@SChernykh](https://github.com/SChernykh).
 - Algorithm `cn/wow` removed, as no longer alive. 
 
+# v3.1.3
+- [#1180](https://github.com/xmrig/xmrig/issues/1180) Fixed possible duplicated shares after algorithm switching.
+- Fixed wrong config file permissions after write (only gcc builds on recent Windows 10 affected).
+
 # v3.1.2
 - Many RandomX optimizations and fixes.
   - [#1132](https://github.com/xmrig/xmrig/issues/1132) Fixed build on CentOS 7.
diff --git a/src/base/io/Console.cpp b/src/base/io/Console.cpp
index 0e5cd269..bba73035 100644
--- a/src/base/io/Console.cpp
+++ b/src/base/io/Console.cpp
@@ -31,8 +31,11 @@
 xmrig::Console::Console(IConsoleListener *listener)
     : m_listener(listener)
 {
-    m_tty = new uv_tty_t;
+    if (!isSupported()) {
+        return;
+    }
 
+    m_tty = new uv_tty_t;
     m_tty->data = this;
     uv_tty_init(uv_default_loop(), m_tty, 0, 1);
 
@@ -53,6 +56,10 @@ xmrig::Console::~Console()
 
 void xmrig::Console::stop()
 {
+    if (!m_tty) {
+        return;
+    }
+
     uv_tty_reset_mode();
 
     Handle::close(m_tty);
@@ -60,6 +67,13 @@ void xmrig::Console::stop()
 }
 
 
+bool xmrig::Console::isSupported() const
+{
+    const uv_handle_type type = uv_guess_handle(0);
+    return type == UV_TTY || type == UV_NAMED_PIPE;
+}
+
+
 void xmrig::Console::onAllocBuffer(uv_handle_t *handle, size_t, uv_buf_t *buf)
 {
     auto console = static_cast<Console*>(handle->data);
diff --git a/src/base/io/Console.h b/src/base/io/Console.h
index c0a36ec4..0a075348 100644
--- a/src/base/io/Console.h
+++ b/src/base/io/Console.h
@@ -26,9 +26,11 @@
 #define XMRIG_CONSOLE_H
 
 
-#include <uv.h>
+#include "base/tools/Object.h"
 
 
+#include <uv.h>
+
 
 namespace xmrig {
 
@@ -39,18 +41,22 @@ class IConsoleListener;
 class Console
 {
 public:
+    XMRIG_DISABLE_COPY_MOVE_DEFAULT(Console)
+
     Console(IConsoleListener *listener);
     ~Console();
 
     void stop();
 
 private:
+    bool isSupported() const;
+
     static void onAllocBuffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf);
     static void onRead(uv_stream_t *stream, ssize_t nread, const uv_buf_t *buf);
 
-    char m_buf[1];
+    char m_buf[1] = { 0 };
     IConsoleListener *m_listener;
-    uv_tty_t *m_tty;
+    uv_tty_t *m_tty = nullptr;
 };
 
 
diff --git a/src/base/io/log/backends/ConsoleLog.cpp b/src/base/io/log/backends/ConsoleLog.cpp
index a5b6c1a7..34a7d66b 100644
--- a/src/base/io/log/backends/ConsoleLog.cpp
+++ b/src/base/io/log/backends/ConsoleLog.cpp
@@ -24,7 +24,7 @@
  */
 
 
-#include <stdio.h>
+#include <cstdio>
 
 
 #include "base/tools/Handle.h"
@@ -32,9 +32,13 @@
 #include "base/io/log/Log.h"
 
 
-xmrig::ConsoleLog::ConsoleLog() :
-    m_stream(nullptr)
+xmrig::ConsoleLog::ConsoleLog()
 {
+    if (!isSupported()) {
+        Log::colors = false;
+        return;
+    }
+
     m_tty = new uv_tty_t;
 
     if (uv_tty_init(uv_default_loop(), m_tty, 1, 0) < 0) {
@@ -66,7 +70,7 @@ xmrig::ConsoleLog::~ConsoleLog()
 
 void xmrig::ConsoleLog::print(int, const char *line, size_t, size_t size, bool colors)
 {
-    if (Log::colors != colors) {
+    if (!m_tty || Log::colors != colors) {
         return;
     }
 
@@ -86,12 +90,18 @@ void xmrig::ConsoleLog::print(int, const char *line, size_t, size_t size, bool c
 }
 
 
+bool xmrig::ConsoleLog::isSupported() const
+{
+    const uv_handle_type type = uv_guess_handle(1);
+    return type == UV_TTY || type == UV_NAMED_PIPE;
+}
+
+
 bool xmrig::ConsoleLog::isWritable() const
 {
     if (!m_stream || uv_is_writable(m_stream) != 1) {
         return false;
     }
 
-    const uv_handle_type type = uv_guess_handle(1);
-    return type == UV_TTY || type == UV_NAMED_PIPE;
+    return isSupported();
 }
diff --git a/src/base/io/log/backends/ConsoleLog.h b/src/base/io/log/backends/ConsoleLog.h
index 90e4fa14..6277cc7b 100644
--- a/src/base/io/log/backends/ConsoleLog.h
+++ b/src/base/io/log/backends/ConsoleLog.h
@@ -27,11 +27,12 @@
 #define XMRIG_CONSOLELOG_H
 
 
-typedef struct uv_stream_s uv_stream_t;
-typedef struct uv_tty_s uv_tty_t;
+using uv_stream_t = struct uv_stream_s;
+using uv_tty_t    = struct uv_tty_s;
 
 
 #include "base/kernel/interfaces/ILogBackend.h"
+#include "base/tools/Object.h"
 
 
 namespace xmrig {
@@ -40,6 +41,8 @@ namespace xmrig {
 class ConsoleLog : public ILogBackend
 {
 public:
+    XMRIG_DISABLE_COPY_MOVE(ConsoleLog)
+
     ConsoleLog();
     ~ConsoleLog() override;
 
@@ -47,10 +50,11 @@ protected:
     void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
 
 private:
+    bool isSupported() const;
     bool isWritable() const;
 
-    uv_stream_t *m_stream;
-    uv_tty_t *m_tty;
+    uv_stream_t *m_stream = nullptr;
+    uv_tty_t *m_tty       = nullptr;
 };