I am currently using my Virgin Media Hub 3.0 in modem mode with the TP LInk Deco S4's as the router and to extend the range of my wifi as I had poor connection upstairs.

This was all working well for months but I have noticed especially in the past month that my Virgin Router would completely reboot at random, anywhere between 1-3 times a day at it's worst, everything maintains its connection to the S4 Deco's but the internet itself drops out until the Virign Router Reboots. 

I thought his was an issue with Virigin after running a self check using their utiliy I was able to get an engineer out in which they replaced the hub and the cable to the wall. 

I used just the Virgin Router for the next 6 days with the S4's turned off, without any issue. 

Hoping the issue was resolved I turned back on the S4's and put the virgin router back into modem mode. 

Again I am experiencing the same issue. 

Has anyone else experienced issues like this or be able to point me in the right direction. 

Is there any settings I could try changing or logs I could look at on the Decos (I dont see anything in the logs on the Virign Router).