Fix or remove the AAAA record for aos96.monster Something published an IPv6 address but nothing answers on it, so IPv6 visitors wait for a timeout first. Either make the server listen on IPv6 (and allow ports 443/80 through its firewall), or delete the AAAA record until it does.
Add IPv6 for www.aos96.monster www.aos96.monster has no AAAA record. Get www's IPv6 address from whoever hosts www and add it as an AAAA record. If the same server already serves both names (and its certificate covers www), you can reuse aos96.monster's AAAA record(s) for www. How to add an AAAA record