The problem is with ipv6 for Ruby gems and Yarn websites and the solution is to lower ipv6 priority in /etc/gai.conf:
precedence ::1/128 50
precedence ::/0 40
precedence 2002::/16 30
precedence ::/96 20
precedence ::ffff:0:0/96 10
precedence 2a04:4e42::0/32 5
precedence 2606:4700::0/32 5