What are the potential problems if the Host Header is not passed correctly through Cloudflare?

If the Host Header isn't passed correctly, several problems can arise. These include: 1) Incorrect content serving – the wrong website's content might be displayed. 2) Application errors – applications that rely on the Host Header for routing or localization may malfunction. 3) Redirect loops – incorrect Host Header manipulation can lead to infinite redirect loops. 4) SSL/TLS certificate issues – the origin server might not be able to present the correct certificate if the Host Header is mismatched.