@Marvin_S I Have TP-Link Deco Be25 Wifi7 router. This Router has two ethernet ports. One is connected to the internet. The other port also has an additional ethernet switch connected to it and...

@Marvin_S I have same problem here on deco be25. Any solution to disable auto wan port?

@TP-Link Very Dissapointed. It's 4 almost years. I am long time TP-Link user. I will never us TP-Link again.