@johanit 

Hi, Thank you very much for the feedback.

"lo estoy usando en Modo brigde"

---Do you set Deco X60 into Access point mode?

Have you seen any error messages on the Deco APP, such as "Abnormal WAN Speed"?

Here are some suggestions for your reference:

1. replace the internet cable between the ISP router and the main Deco X60 with another new Ethernet cable.

2. connect the ISP router to a different port on the main Deco X60.

3. If possible, it is also suggested to refer to this link to set another Deco X60 as the main Deco.

How to replace the main Deco with another Deco

Wait for your reply and best regards.