I don’t know. If I use chrome on the same device there are no issues. You can’t be certain but I think it’s not DNS.
That might be evidence in favour of it being a DNS issue. Google Chrome doesn’t always use the system’s DNS.
It’s almost never DNS, except when it is.
Try setting your DNS to adguards default servers and see if that helps.
Those addresses are 94.140.14.14 and 94.140.15.15.
If you don’t want to do that you could always set it to 1.1.1.1 but adguards DNS servers also help filter ads so that’s nice.