Hi there - sorry that we didn't post an answer to this. I do believe we've updated the docs to reflect this.
If you join the M365 developer program using your enterprise address, sometimes authentication gets confused between your enterprise subscription and your developer subscription. For best results, try logging into your developer tenant/subscription (xxxx@xxxxxxxxxxxxx .onmicrosoft.com) using an In Private window. Alternatively, I use my "work profile" to log in to my enterprise subscription and I use my "personal profile" to log into my developer tenant.
Hope this helps.
@Sven Giermann