In the server that I've made, a weird glitch occurs where a random item(namely damaged armor) pops up in a free slot, then disappears. Another thing that seems to be linked is that when you hover over a spawner it disappears. The reason I need help with this is that, this problem is extremely annoying, and makes it harder to moderate, because it also shows it being dropped before it disappears, so if you're being invis, You'll then be found, because of this. I think this is due to a plugin because this started happening recently, and I get new plugins daily. To e more detailed it's normally gold and diamond armor.