Found that update:
https://letsencrypt.status.io/pages/history/55957a99e800baa4470002da
March 5, 2020 21:42 UTC
[Resolved] Over 1.7 million affected certificates have been replaced and were revoked. We will continue to revoke more as we become confident that doing so will not be needlessly disruptive to Web users. Please read our community forum update for full details community.letsencrypt.org/t/2020-02-29-caa-rechecking-bug/114591/3