Do you have a link to the website?

This should be fixed now, please let me know if it still reproduces.

Thanks for reporting! I've forwarded it to my team members to take a look

Thanks for spotting this! Can you file a bug against bugs.webkit.org ? I can forward it to the relevant folks

Send us a bug report on bugs.webkit.org with your testcase :)

Glad you enjoyed it! There are not many resources besides from the specification (drafts.csswg.org/css-forms-1) available at this time.

Stay tuned for more updates, we'll likely write a couple of blog posts over the coming months as things unroll!

Thanks, hope to see you again soon! The two other folks were Kevin Letchford and Zuza Gronska :)