With the anniversary update, the spotlight feature works on Login screen as well (yay!!)

But... anecdotal evidence indicates that currently the Windows Spotlight will ONLY change pictures at a later time after you have invoked the lock screen at least once.

But the problem is, not everyone has a habit of going to the lock screen daily (like me with my home machine that basically doesn't need to be locked, unlike in an office environment). As it is now, if I want to see a new spotlight picture for my power-up login screen, the only way that works for me is to go to the LOCK screen on purpose after I have signed in, then go back to desktop immediately. Then on the next day, I will most likely see a new picture for my login screen.

.... Why do I have to lock my screen JUST for the sake of seeing a new spotlight picture on my login screen?? Or have I missed anything here?