I made lamps in my superflat creative world that only turn on at night. I later turned it to always day to help with my building. After a while, about 20-60 minutes, the daylight sensor started gliching and a few lamps turned on even though it was still day. It fixed itself when I gave the daylight sensor a block update.

How to reproduce: created a creative world with always day. Place a daylight sensor with an output like a lamp and wait 20-60 minutes. Make multiple units because it might not always happen. Certain ones in my world glitch more often than others.