Some european DNS servers (especially dutch and northern european) have been resolving roblox.com to 128.116.121.3, which is non functional, resulting in roblox.com as root domain being unreachable and does not redirect, pinging www.roblox.com resolves to the correct ip address, 128.116.21.4
Both of my ISP Telia, and Digitalocean droplet in AMS3 resolves root domain roblox.com to 128.116.121.3, www.roblox.com works as normal
The droplet is newly created, and I cleared my host cache before the test