@Pop060955
Hi, thank you very much for the feedback.
It is recommended to send an email to forumsupport.usa@tp-link.com with the following information:
Subject: [Forum Escalation][ID 852062] LAN goes down when WAN outage
Thread URL: https://community.tp-link.com/us/home/forum/topic/852062
Description: WAN/LAN Auto-sensing and need to fix the WAN port
Any Other Relevant Information (Logs, Config Files, Images, etc.): May I know your ISP and the model number of the ISP gateway(cable or fiber modem)?
Once sent, a ticket will be created in our support system, and a member of the team will follow up to gather more information or troubleshoot the cause.
Thanks a lot.
Best regards.
(Please also update here with the support ticket ID. Thank you in advance.)