Why were the patch versions for CVE-2021-41805, CVE-2020-12797, CVE-2021-32574 released so late?

We are a research team dedicated to Golang, have discovered that CVE-2021-41805, CVE-2020-12797, CVE-2021-32574 were addressed in commit 7a4fb0d0e573678712b1f478049ae2d4c07f9b91, 98eea08d3ba1b220a14cf6eedf3b6b07ae2795d7, 12b7e07d5ccd6604354c7896294c940705e714f6. However, upon analyzing the commit, we observed that the patch version (v1.12.0-beta1, v1.9.0-beta1, api/v1.10.0) were released after a lapse of over one month. We are interested in understanding the reasons behind this delay in releasing the patch version, as it could potentially impede the prompt dissemination of patches to downstream users. We seek clarification on whether the delay might be attributed to:

  1. Issues with testing and CI checking.
  2. Other commits requiring inclusion in a single release.
  3. By convention, infrequent release of versions.
  4. Other reasons.
    We appreciate your attention to this matter and eagerly await your response. Thank you.