I had a similar thing happen to me in the USA actually but had a different outcome. I got on instagram.com (when it was still served over HTTP) one day and not

I had a similar thing happen to me in the USA actually but had a different outcome. I got on instagram.com (when it was still served over HTTP) one day and noticed an alignment issue. I believe reddit also had the issue. It was caused by a rogue iframe that was being injected into the page. After some investigating the iframe domain was owned by my ISP. I sent emails to some of the higher ups telling them they should stop and the problem disappeared after about a month, and wrote a chrome extension to block the domains in the meantime. Not really sure what their idea was but it goes to show that you can't trust your ISP anywhere in the world (or anyone on the internet for that matter).