Hello @Richard3234 ,

Welcome to our community.

Do you mean if you enable the MLO network, all wireless networks will disappear, right? And you need to disable the MLO network to restore the wireless connection?

Has this unexpected behavior existed since you started using the router?

Please confirm that the MLO network name is different from the main network. 

We recommend sending an email to forumsupport.usa@tp-link.com  with the following information:

Subject: [Forum Escalation][ID 856116]Archer BE550 WiFi Stopped Broadcasting after the MLO network enabled

Forum Nickname: Richard3234

Thread URL: https://community.tp-link.com/us/home/forum/topic/856116

Model&Version: Archer BE550-v2-1.2.5

Description: 

Any Other Relevant Information: Please attach the configuration file on your BE550 for further investigation.

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 case.