Hello, apologies for writing in English, my Dutch is not yet on the level to to discuss technical topics. 

On Friday, 18 August at about 18:00 my internet connection went out for about ~15m, restarting the Box 12 did not help. It seemed to resolve itself out, but what I have started noticing are random brief disconnects. 

I went ahead to plot ping graphs to one.one.one.one(1.1.1.1) Cloudflare DNS, that is also configured in the router in “Thuisnetwerk → DHCP”. 

What I saw was what seems to be random connection drops but with each drop having the same duration of about 3 seconds, in most cases.

Over a span of 30m I had about 5% packet loss. Attached are screenshots of ping plotter.

The modem displays that the internet connection is being active for 0 minutes each time this happens, meaning that the router lost it. 

I work remotely for a High-Frequency Trading (HFT) firm, where network stability is incredibly crucial to my job, as I need persistent connection to remote hosts, and these drops time me out of my remote sessions. 

I would appreciate any support.

Router model: SagemcomFast5359_KPN

FW version: V12.C.23.04.33