Hi,
According to the messages, heartbeat packets are arriving too late.
I suggest that you run a ping command from the same machine you use to play to your server in parallel and see if there's a spike in latency at the frequency you said (every 60s).

Hello,
I d'ont see any error in the log you provided.
What do you mean by "isn't working" ?

I asked for a roadmap or anything, here is the answer :

Random heroku support guy wrote:Hello,

We don't currently have any plans to support IPv6, to keep up to date with product announcements and new features, please subscribe to our Blog and Changelog

Best,
Tim

There's nothing more I can do on my side.

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