I was able to solve DNS issues with my domains at Porkbun by:

  1. Log in to Porkbun account, go to "Domain Management".
  2. Click "DNS" link under affected domain.
  3. Click the "Yes, please update my domain" button in the red box at the top, screenshot:

https://i.imgur.com/Yfjlqit.png

Parameters were stripped from original URL. https://twitter.com/search?q=porkbun&src=typed_query&f=live

Domains registered at Porkbun are not resolving.