RBR50 keeps failing (wired and wifi connections)

Hi, I have an Orbi RBR50 and its satellite (RBS50), both with firmware V2.7.4.24, but the RBR50 keeps disconnecting me (becomes unavailable) and the problem is only solved by rebooting it.

It was working fine before my vacations... I have plugged it off from power... 10 days later, powered it on and it is unstable for 2 days.

I have tried to backup config, reset to factory settings and restore config, but it didn't solve the problem.

The troubleshooting options seems to be very limited on this device... Any hints would be really appreciated.

Some additional information:

• Both wired and wireless connections fail;
• Only reboot solves the problem;
• Armor is not enabled.
• Daisy chaining disabled.

Thanks