FileVault Oddities in High Sierra

I'm wondering if anyone has noticed odd changes to FileVault recovery options in High Sierra.

With the previous OS, Sierra, I chose to use FileVault's iCloud option to unlock my drive and reset my password in the event I forgot it, and the result of that choice was that the FileVault window in System Preferences indicated that I could use my iCloud account to unlock my drive, and when logging into my Mac, the login window would offer the option to use my appleID/iCloud account if I took more than a minute or so to to log in.

However, after upgrading to High Sierra (with FileVault fully enabled), the above has changed. The FileVault window no longer states that I can unlock my drive with my iCloud account; rather, it says a recovery key is necessary (which I don't have because I was never presented with one, because I never chose that option). And the login screen no longer presents me the option to use my appleID/iCloud account to log in, should I wait longer than a minute or so to enter my local password.

One Apple Care senior advisor I spoke with thought this was strange enough to ask for log files from my Mac. Another senior advisor simply told me that the way to unlock now is to boot into the recovery partition, launch terminal and launch the reset password tool, which in the end does ask for my Apple ID and password. Ok, nice to know there's a workaround, but it just struck me as odd and very "un-Apple-like" (a key functionality requires the use of a terminal command, while the FileVault window makes it clear a "recovery key" is required, when in actuality, that's not quite true, since I chose the iCloud unlock option?)

I'm starting to wonder whether something went strangely awry in my install or if others were noticing this same issue? Before I spent the time doing a clean install to see if that changes anything, I thought I'd reach out here.

Thanks.