Hello KinCony Support,Thank you for your suggestion.
I have tested the KCS v2 firmware (v2.2.21) as requested.
I have since returned to my own Arduino firmware, which I am developing into a standalone web-based controller for my Bradley smoker.
The current setup is working well, including WiFi Access Point mode and the web interface.
The relay behaviour I observed was during my earlier testing and is not currently an issue with the present setup.
Thank you for your assistance.
Best regards
Natravn