KC868-A4 – Relay 1 clicks repeatedly when WiFi Access Point (AP) is enabled

[Natravn]

Hello KinCony team,
I have a problem with my KC868-A4 board.
Problem:
Relay 1 switches ON and OFF intermittently when WiFi Access Point (AP) mode is enabled.
I have performed several tests using a simple Arduino sketch with no relay control code at all.
Test results:

1. Code:

   WIFI_MODE_NULL
   – WiFi disabled: No relay clicking.
   
2. Code:

   WIFI_STA
   – Station mode, without connecting to any network: No relay clicking.
   
3. Code:

   WIFI_AP
   – Access Point mode: Relay 1 starts clicking intermittently.
   

Additional information:

• The DS18B20 temperature sensor on GPIO13 works correctly in all tests.
  
• I have tried a different power supply. The problem remains.
  
• No external loads or devices are connected to the relay outputs.
  
• Relay 1 is the only relay that clicks.
  
• The LED for relay 4 stays constantly illuminated.
  

My questions:

1. Is this a known issue with the KC868-A4?
   
2. Could WiFi AP mode interfere with GPIO2 or the relay driver circuit?
   
3. Could this indicate a hardware fault on my board?
   
4. Is there a recommended solution?
   

I would appreciate your help in identifying the problem.
Best regards
Natravn