Place an end crystal on an obsidian.
Place a pressure plate next to it.
Step on the pressure plate.
After you stop stepping on the pressure plate, you will see the wooden, heavy weighted and light weighted pressure plate will not deactivate; the stone pressure plate will deactivate.
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@unknown the issue here is not that the stone pressure plate is not activated; it is that some of the pressure plates get activated, but only once a player steps on it, and then they stay activated. This is similar to MC-260653 which was a valid bug.
that's because most of the entities can activate non-stone pressure plate but only mobs, player, armor stand, boats, boats with chests, and any type of minecarts can all pressure plate. however, if instead, the bug is "end crystal dont activate stone pressure plate", i can confirm, but might intended, see MC-20410