Hello Mojang my name is Kevin Flewellen-El, I am a big fan of minecraft, especially the Java edition version. I am here to inform you of a glitch I found in the game. I'm not sure if it's new, old, or something that is suppose to be in the game, all I know is that when any item is put on top of a cactus it strangely despawns. I have no idea why this happened's but all I know is this is a bug In the most recent Nether update as far is know.
Kevin Flewellen-EL
Yes, cactus is spikey and hurts players, mobs, and items.