Orbi RBK853 losing connection

Last month I replaced my old Netgear R6300 router with a brand new Orbi RBK853 set (1 router, 2 satellites), as the old one just couldn't pull it anymore. The new set works great and gives me fast and stable connection throughout the entire house.

But roughly once every 2 days (3-4 times a week, at different times of the day, sometimes in the middle of the day while I'm working, sometimes in the middle of the night) the router loses its internet connection and lights up purple. I have no idea why that is happening, and the router does not seem to be able to recover the connection on its own.

I never had these issues with the old R6300... the internet connection in my region has always been extremely stable and reliable.

When the Orbi router loses its connection, all I have to do is log in to the router's web page and click the "Test" option. That's enough to restore the connection.

Does anybody have any idea why this is happening, what I can do to stop this from occurring, or how I can find out what is triggering this (maybe any particular logging that I can activate somewhere) ?

Thanks in advance for any help you can offer!

Fred

Edit: PS: both the router and the satellites are running on the latest firmware version V3.2.16.22_1.4.9