UDP network problems (connecting to the game on Review)

Hello! Recently, when I sent an application for review, the reviewer rejected it. The reason is as follows: on an iPad or iPhone (version of iOS 13.5, 13.5.1), it is not possible to establish a network connection to the game on Wi-Fi.

The game works on the IPV6 dns/64. We performed a series of tests and found out that packets from the client reach our server, but we don't receive responses from the server on the client.

Please tell me what could be the problem?

Thank you for your time!

Replies

We are facing the same issue with our game.

It appears that Apple reviewers test apps behind a VPN. And this VPN is blocking some ports and not forwarding all traffic.

We didn't find a solution yet. But we will try to submit another version using common ports (80, 443)