Where the delay comes from

If your machine has an IPv6 address and DNS returns an AAAA record, the system tries IPv6 first. When the node or the destination is IPv4-only, that attempt has to time out before it falls back — which is exactly the "pages hang for a few seconds" symptom.

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The switches you can move

  • The enable-IPv6 option in parameter settings. If you're unsure, turn it off; IPv4-only outbound is the simplest setup.
  • In DNS settings set queryStrategy to UseIPv4 so AAAA records never come back in the first place.
  • TUN mode has its own IPv6 toggle. Keep both consistent — enabling one side only invites routing black holes.

When it's worth enabling

Only if the node genuinely supports IPv6, or you need IPv6-only resources such as some campus and academic services. Turning it on because it sounds more modern mostly buys you strange bugs.