Decal Batch doesn't work on all devices Libgdx

Question

I tried rendering using Libgdx's DecalBatch on my phone and my friend's phone. It's rendering a 2D image with thickness.

A decal at the front and back side is created, then individual decals for every pixel at its side.

Then, I flush (render) the decals.

On my phone, it gave this result: It worked as expected.

However, on my friend's phone, it didn't render at all: It didn't work as expected.

How do I fix this? Or is it a bug in Libgdx?

Answer 1

I've got it working now!

I forgot to add this one line of code:

Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);

I mainly forgot to put the depth buffer bit. Anyways, thank you to everyone who has helped.