Hi Eelco Stekelenburg,
The version could be a pre-release or internal build not meant for public distribution. These internal versions are often used for testing or development and may not be included in the official release notes.
If a custom deployment method is used (such as a custom image or specific deployment script), it may unintentionally include a version that hasn't been officially released or documented.
If the information is helpful, please consider by clicking the "Accept answer" on the post.
Thank you.