Hello AGOL Team,
We recently discovered an issue when transferring user's content form the org's admin member page.

When creating the transfer we get this confirmation:

After 15 mins of waiting we noticed that some content still had not been transferred. We never received a message of error on this screen.
When going into the user's content and manually transferring, this was the only time we were able to see that an error existed:

Please add these error messages as part of the Admin content transfer screen under Organization> Member management.
Thank you,
Amanda Huber