Ever since we switched to FIOS Quantum, we've experienced a drop once per hour. I have three Netgear EX7000 range extenders around the house connected at 5GHZ and a secondary router which services 2.4GHZ (2.4 is turned off in the Quantum). Our service is fine for 58 minutes out of the hour but then it all drops. I set up a continuous ping to the outside gateway and here is the summary:
start: 2019-02-04 19:43:10, end: 2019-02-04 19:45:23
start: 2019-02-04 19:46:13, end: 2019-02-04 20:42:09
start: 2019-02-04 20:42:59, end: 2019-02-04 20:46:42
start: 2019-02-04 20:50:13, end: 2019-02-04 21:49:39
start: 2019-02-04 21:50:49, end: 2019-02-04 22:49:08
start: 2019-02-04 22:52:38, end: 2019-02-04 23:49:12
start: 2019-02-04 23:49:32, end: 2019-02-05 00:49:09
start: 2019-02-05 00:52:13, end: 2019-02-05 01:47:59
start: 2019-02-05 01:48:46, end: 2019-02-05 02:48:03
start: 2019-02-05 02:49:23, end: 2019-02-05 03:47:02
start: 2019-02-05 03:47:59, end: 2019-02-05 04:46:38
start: 2019-02-05 04:48:06, end: 2019-02-05 05:46:25
Around the 50th minute of the hour, the router will restart. Apparently it's not doing a hard reboot because Verizon tech support only noted a single reboot (which is the one I did hoping it would fix the problem). I went to the local Verizon store and got a new router hoping that would fix the problem but it didn't.
One suggestion from tech support was to disconnect everything before going to bed (extenders, add'l router), plug a laptop in hardwire and monitor it overnight to see if it still drops.
I had this network architecture with an older Verizon router and it was fine and also with XFinity service. Just started happening when we switched to the Quantum router.