I may have had the same problem: monitored the issue for several days and saw a 15 minutes (900 seconds) delay between each interruption. Talked to support and the older Thomson router was replaced with a Technicolor TC7200.U router.
However, I am still seeing the same 15 min “hiccups”.
This only happens on WiFI:
- 5GHz access point
- Greenfield (802.11n)
- Channel: Auto
- Bandwidth: 20/40 MHZ
Please report back on your experience. Was the problem solved?