@md_5 Please change this bug to Critical and add 1.9.2 to the affected versions.

@Thijs U'r not alone dude. This issue is the F* worst cancer that could strike anyones server.

@S3venAU yes there is a difference because this is a pvp logger plugin that has to kill the player, I'm not actually clearing the inventory, I just damage the player and let the server drop the items naturally.

Anyway, weird bug, weird solution, I've found that if the player pickups a damaging item (a sword, any kind), once he has joined, it "resets" his damage attributes or something like that.
I'm not sure why it does that but it solved my issue so I'm sharing it here.

So, you have to give a damaging item (wooden sword here) when the player is fully loaded (50 ticks to be sure), and when the player the you remove it.
You will see the item going in your inventory bar and remove straight away, but it's not a big deal. If you give a wooden sword it won't be a problem, just make sure you are not giving a diamond sword

	@EventHandler(priority=EventPriority.HIGHEST)
	public void onPlayerJoin(PlayerJoinEvent e){
		Player player = e.getPlayer();

		Bukkit.getScheduler().runTaskLater(getPlugin(), ()->{
			player.getInventory().addItem(new ItemStack(Material.WOOD_SWORD, 1));
			player.updateInventory();
			Bukkit.getScheduler().runTaskLater(getPlugin(), ()->{
				player.getInventory().remove(new ItemStack(Material.WOOD_SWORD, 1));
				player.updateInventory();
			}, 1);
		}, 50);
		
	}

@val59000 If you are currently clearing it in the quit event, then change it to clearing within a scheduled task on join instead. I can't see that there will be any functional difference between clearing it when they quit or when they next join.

I think this will be never be fixed for 1.8.x, but might already be fixed within 1.9

Ok, upvoted it, I wonder why it is marked as a "minor" bug, it should be "critical", it can ruin any pvp game on any server.

@val59000 Upvote this issue.

Anyone who is experiencing this horrible bug should upvote tis ticket.

Well I'm not clearing the inventory in the Player join event, this bug happens after I clear the inventory in the player quit event (for a pvp logger plugin).

@val59000 This bug is due to the fact that the onJoin event fires before the player is fully loaded and ready to be modified. Here's how I solved the problem in my plugin. When someones joins, schedule a task for a couple of ticks later and clear the player's inventory in that task (and whatever else I want to do with the player on join).

Any news on how to fix that bug ?
It makes players able to kill other players with armors with only a few hit by hand.