Sonoff T1 with Tasmota help needed

[klaasvd]

Hello,

i recently started with house automation, and first project is a T1 sonoff wall switch with touch. So the flashing part is done, i also got in domoticz and can controll it. So far it went well, untill i put on main current there came a high pitched sound out of it. First i thought it was faulty wiring or it was broken. Wiring seems fine, so i put it on the pc with usb connection, this time not only the board, put while its still plugged in the piece where wiring goes in. First it was silent, but then it started again making this sound.
From the console i learnt, it's auto switching states, i don't know where this is coming from. But it also started making the sound after auto switching states to ON
This was in console:
16:25:50 MQT: domoticz/in = {"idx":1,"nvalue":1,"svalue":"","Battery":94,"RSSI":9}
16:25:50 MQT: stat/Gangkast_Touch/RESULT = {"POWER":"ON"}
16:25:50 MQT: stat/Gangkast_Touch/POWER = ON

Someone reconizing this problem?

Thank you in advance

[klaasvd]

So i tried a reflash, same outcome, gives high sound/beep continuously, im sure its the buzzer, but i dont understand what is setting him off