@Cypress7 I'm facing the same! 

It happens so randomly. I have 2 nodes of Deco X60, main one connected to ISP fiber modem via wired ethernet and 2nd node connected wirelessly to 1st. Deco's are configured in AP mode of operation. 

It sometimes resolves after rebooting Deco's from the app, but it is so frustrating. 

Btw, I'm on firmware v 1.2.9 B20240722, and it doesn't show an update available in India.

  @jazdev I FDR'ed my modem and deco's and have stuck to using just the default settings and my issue has not reproduced since, so not entirely sure which setting was causing this.