Each time I install a beta, and this time is no exception (it's happened 9 times so far ...), as my laptop is booting up completing the install, my Apple ID gets locked. My phone and iPad get popups asking me to login to iCloud, after which I get the message that the account is locked. So I unlock it and then am forced to pick a new password. At the moment, I just change a number in it, hence why I know it's been 9 times so far 
So I have to log back in to iCloud, iTunes, the App Store, FaceTime and iMessage on all my devices. I've become efficient at this process but it's irritating.
This time, before installing the beta I thought ti try logging out of iCloud on my laptop before running the installer. NO different.
I don't see other posts on this, so is this only happening to me? I log a Feedback each time, but anyone got any ideas what could be doing this? It seems the install must be probing my account with an old password somehow and failing.
So I have to log back in to iCloud, iTunes, the App Store, FaceTime and iMessage on all my devices. I've become efficient at this process but it's irritating.
This time, before installing the beta I thought ti try logging out of iCloud on my laptop before running the installer. NO different.
I don't see other posts on this, so is this only happening to me? I log a Feedback each time, but anyone got any ideas what could be doing this? It seems the install must be probing my account with an old password somehow and failing.