Whenever I'm connected to a network through my Archer C7 router, some content just doesn't load, as if the destination host doesn't exist or if there's some firewall blocking it.

I investigated last night and managed to identify that all content from the host: instagram.fbhz2-2.fna.fbcdn.net does not appear to me. This happens to others as well, but I took this as an example of the problem. All from META Apps (Facebook, WhatsApp, Instagram).

If I connect to my provider's network directly, the same content loads. If I use 4G or 5G from my mobile operators, they also work.

I tried to connect on Wifi 2.4G, 5G and directly via LAN but it doesn't work.

My equipment is no longer under warranty, so I tried a few things myself: 1) reset to default factory and reconfigure 2) Just reset to default factory (no additional configuration) 3) Disable parental control and SPI firewall 4) Setup manually google's DNS and OpenDNS 5) I changed the provider's device LAN port.

I know it's something very strange and it's an illogical problem, but that's what's happening here. I didn't even call my access provider since using his equipment's network, this problem doesn't occur.

Does anyone have any suggestions for me other than changing my router?