Visa application is riddled with scams. From the simple website that charges you twice the price to websites that will tell you that you were rejected and then fake your documents to get in with your name. So they're probably trying to see that you're not one of those web servers, a proxy for them or detect some known C2 channels.
That would be quite clever for an incredibly horrible website. The other day my SO, who is a Turkish citizen, was filling up her visa application and after half an hour of meticulous form filling the system just kick her out. I think the session times out or something. If you haven't created an account or you haven't write down the current application ID everything is lost. In the process she was also directed to a n…
These random logouts happens more frequently during certain times of the day and seems to follow a semi-predictable pattern. It is almost certainly tied to system load in some way.
Also, the site's HTML and JavaScript are bloated beyond hope for what should be a fairly simple set of web forms. And itnhas been thisnway since at least 2018 with exactly zero improvements.