diff --git a/components/bootloader_support/src/bootloader_console.c b/components/bootloader_support/src/bootloader_console.c
index 66ee195a3b1..1cadc670667 100644
--- a/components/bootloader_support/src/bootloader_console.c
+++ b/components/bootloader_support/src/bootloader_console.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2020-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -54,8 +54,9 @@ void bootloader_console_init(void)
     const int uart_tx_gpio = CONFIG_ESP_CONSOLE_UART_TX_GPIO;
     const int uart_rx_gpio = CONFIG_ESP_CONSOLE_UART_RX_GPIO;
 
-    // Switch to the new UART (this just changes UART number used for esp_rom_printf in ROM code).
-    esp_rom_output_set_as_console(uart_num);
+    // Switch to the new UART
+    esp_rom_output_set_as_console(uart_num); // changes UART number used for esp_rom_printf in ROM code
+    esp_rom_output_switch_buffer(uart_num);
 
     // If console is attached to UART1 or if non-default pins are used,
     // need to reconfigure pins using GPIO matrix
diff --git a/components/esp_system/port/cpu_start.c b/components/esp_system/port/cpu_start.c
index 7b69768dfba..3d34e018e92 100644
--- a/components/esp_system/port/cpu_start.c
+++ b/components/esp_system/port/cpu_start.c
@@ -233,6 +233,9 @@ void IRAM_ATTR call_start_cpu1(void)
 #elif !CONFIG_ESP_CONSOLE_USB_CDC
     esp_rom_install_uart_printf();
     esp_rom_output_set_as_console(CONFIG_ESP_CONSOLE_ROM_SERIAL_PORT_NUM);
+#if CONFIG_ESP_CONSOLE_UART_CUSTOM
+    esp_rom_output_switch_buffer(CONFIG_ESP_CONSOLE_UART_NUM);
+#endif
 #endif
 
 #if CONFIG_IDF_TARGET_ESP32
diff --git a/tools/test_apps/system/build_test/sdkconfig.ci.custom_uart b/tools/test_apps/system/build_test/sdkconfig.ci.custom_uart
index 80ed1761ac2..56ee759e76b 100644
--- a/tools/test_apps/system/build_test/sdkconfig.ci.custom_uart
+++ b/tools/test_apps/system/build_test/sdkconfig.ci.custom_uart
@@ -1 +1,2 @@
 CONFIG_ESP_CONSOLE_UART_CUSTOM=y
+CONFIG_ESP_CONSOLE_UART_CUSTOM_NUM_1=y