@knuthollund update: the #every-few-minutes-unresponsive-for30-seconds-issue occurs *only with IPv4* ! This will be the reason why you have never encountered it yourself... let me guess:you have IPv6 internet connection at home.

I discovered it with this shell command:

LANG=C; while true; do echo $( date; ( wget -4 -O /dev/null 'https://quitter.no/main/public' 2>&1 | grep "Connecting" ) ); sleep 5; done

This will fetch quitter.no's public timeline page every 5 seconds with either v4 or v6.

Result (side-by-side-comparison):

!gnusocial https://quitter.no/attachment/1781799