[1.15.2] Render Overlay blit behaving weirdly (trying to create HUD UI)

Hello! I'm trying to adventure myself into minecraft modding, and now my next goal is to render a HUD bar, like a new XP bar for the user.

This is the current code that renders something on screen:

package br.com.rotstudio.phantas.util;

import com.mojang.blaze3d.systems.RenderSystem;

import br.com.rotstudio.phantas.Phantas;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.screen.Screen;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.text.ITextComponent;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import net.minecraftforge.client.event.GuiScreenEvent;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.client.event.RenderGameOverlayEvent.ElementType;
import net.minecraftforge.eventbus.api.SubscribeEvent;

@OnlyIn(value = Dist.CLIENT)
public class RenderGUIHandler{
	
	Minecraft minecraft = Minecraft.getInstance();
	
    public ResourceLocation tex;

	
	public RenderGUIHandler() {
		tex = new ResourceLocation(Phantas.MOD_ID, "textures/hud/hud.png");
	}
	
	@SubscribeEvent
	public void renderOverlay(RenderGameOverlayEvent event) {
		
		if(event.getType() == ElementType.HEALTH) {
			RenderSystem.pushMatrix();
			
	
			int posY = 16;
	        int posX = 16;
	
	
	        RenderSystem.pushTextureAttributes();
	        
	        RenderSystem.enableAlphaTest();
	        RenderSystem.enableBlend();
	        RenderSystem.color4f(1F, 1F, 1F, 1F);
	        minecraft.getTextureManager().bindTexture(tex);
	        minecraft.ingameGUI.blit(posX, posY, 0, 0, 32, 32);
	        	        
	        
	        RenderSystem.popAttributes();
			
			RenderSystem.popMatrix();
		}
		
	}

}

But when in game, it renders weirdly:

And the HUD png image looks like this:

It seems its rendering some other minecraft texture atlas on top of my texture, and i have no idea why it does this

does anyone has any clue on what could be happening?

Thank you!