I have deployed a private cloud disk service on my Buntu touch device, which opens port 5212 and uses supervisord as a process guardian. When accessing the device port through internal IPv4, everything is normal, but when accessing through public IPv6 address, it returns a 502 Bad Gateway. But after pinging the IPv6 address of the device and attempting to access it again, it worked normally. May I ask if there are any good solutions available？