Occasional IPAddr::InvalidAddressError

[espen]

Our error logs are showing IPAddr::InvalidAddressError occasionally. I see that it is called from rack-attack but since we run a custom web server it could also be an invalid value being passed on. I did not see this when we were on Heroku. Anyone noticed this error?

/usr/app/ruby/4.0.1/lib/ruby/4.0.0/ipaddr.rb:758→ 'IPAddr#in6_addr'
/usr/app/ruby/4.0.1/lib/ruby/4.0.0/ipaddr.rb:693→ 'IPAddr#initialize'
rack-attack-6.8.0/lib/rack/attack/configuration.rb:65→ 'block in Rack::Attack::Configuration#blocklist_ip'
rack-attack-6.8.0/lib/rack/attack/check.rb:15→ 'Rack::Attack::Check#matched_by?'
rack-attack-6.8.0/lib/rack/attack/configuration.rb:89→ 'block in Rack::Attack::Configuration#blocklisted?'
rack-attack-6.8.0/lib/rack/attack/configuration.rb:89→ 'Array#any?'
rack-attack-6.8.0/lib/rack/attack/configuration.rb:89→ 'Rack::Attack::Configuration#blocklisted?'
rack-attack-6.8.0/lib/rack/attack.rb:113→ 'Rack::Attack#call'