There is a bug with the pick block that allows players in creative mode to receive items they probably aren't supposed to have. You can set down a daylight sensor, invert it, and then use pick block on the inverted daylight sensor to obtain a block called: tile.daylight_detector_inverted.name. There might be more blocks that do this, but so far its only the daylight sensor.
If any of this other information is useful:
The inverted daylight sensor used to obtain tile.daylight_detector_inverted.name was in full daylight
The player obtaining tile.daylight_detector_inverted.name was in creative mode
The world being played in had a few custom created resource and behavior packs that did nothing more than add a few mobs to the game
The issue occurred in single player and multiplayer
The keybind used for pick block was "P"
Thank you for your report!
We're tracking this issue in MCPE-179063, so this ticket is being resolved and linked as a duplicate.
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