If i delete a port forwarding entry on my router for NAT, access to my Minecraft server is lost despite having a A and AAAA DNS record which allows for resolution of IPv4 and IPv6 addresses.
Passing through IPv6 setting to true or disabling IPv4 support does seem to allow for access but that is post facto and it should be set by default.
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MMK21
migrated
JVM Arguments are still required to enable IPv6 support which relates to the Java Edition.
Arisa Bot
Thank you for your report!
We're tracking this issue in MC-3776, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Fixed. The fix will arrive in a future version or is already included in the latest development version of the game; you can check the Fix Version/s field in that ticket to learn more.
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This seems to be an issue with the launcher.