I just want to point out that this issue encompasses more than just Whatsapp. I don't use Whatsapp, but have this exact problem for the last 2-3 weeks on my home Rogers Ignite Wifi only, and with multiple Android apps on multiple devices (Samsung S9 on Android 10, Asus Chromebook with Android 9). I logged a ticket and Rogers Support and they acted like they've never heard of this before even though there are pages and pages of complaints for this issue in this forum. Went through the usual factory reset of Ignite gateway etc like everyone else, to no avail. What works is switching to a private vpn to bypass Rogers DNS, but this is not a proper solution.