[Router] Frontier NVG443B wifi 2.4 and 5 Gig disabled spontaneously.

Working away, this morning about 10 AM Eastern, 10/19/20 and boom wifi gone. NVG443B wifi indicator off. ANYBODY else have this happen recently???? I connect with Ethernet cable and find normal router configuration EXCEPT, 2.4 and 5 Gig wifi are set to disabled. I live in a very rural area, no other wifi in range, so I presume these changes came from the internet. The router is password protected, but my impression is Frontier has a backdoor these days. Using Ethernet I reset these two wifi settings to enabled and the network is fine. I found nothing else changed on the router and I do have a somewhat unusual config, so if there was a major update I would have noticed. Thanks!