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When these happen to me there’s two main causes, one is the Fae playing silly buggers, but they do this to small metal things like keys, scissors and knives. If this is the case, you can ask for them to “help you find” the items and you’ll usually find it right where you already looked.
The other is switching universes due to your vibrations changing. Manifestation magick causes this sometimes, and the more magick you do the more it can happen. You can also cause it by accidentally moving through a portal. The things that change are usually minor and don’t seem very relevant or helpful, but something else about that version f the inivers is better in sync with your new vibration so you’re now manifesting in that one.
As an analogy, I liken it to changing lanes on a six lane highway… you’re still on the same highway, it looks almost identical, but to be able to take a given exit (get a result) you had to get into the right lane. It’s hard to change too many lanes at once, but bit by bit you move over to get where you’re going. It’s not really important that the road itself looks a bit different as long as you’re still on the right road.