Experience Orbs treat flowing lava as a full block

Can confirm in 1.17.1.

I am also able to confirm that this is an issue.

This does not relate to MC-167712
This bug is due to an issue in the experience orb code.

Experience orbs doing something called a `pop` when they touch lava. Basically, the experience orb pops out of the lava right before it dies. The problem is that the pop only checks if it's in a lava block (the full block), and the pop gives upwards velocity. So if the experience orb touches a flowing lava block, it does the pop effect before it actually touches lava. Making it so that the experience orb never burns in flowing lava.
We fix this by simply checking if the experience orb is actually within the lava. We can do this the same way that we check if the experience orb is in water:

Code Analysis - Yarn Mappings 1.18 - ExperienceOrbEntity.java

public void tick() {
    //...
    if (this.world.getFluidState(this.getBlockPos()).isIn(FluidTags.LAVA)) {
        this.setVelocity((double)((this.random.nextFloat() - this.random.nextFloat()) * 0.2F), 0.20000000298023224D, (double)((this.random.nextFloat() - this.random.nextFloat()) * 0.2F));
    }
    //...
}

The Fix:

public void tick() {
    //...
    if (this.isSubmergedIn(FluidTags.LAVA)) {
        this.setVelocity((double)((this.random.nextFloat() - this.random.nextFloat()) * 0.2F), 0.20000000298023224D, (double)((this.random.nextFloat() - this.random.nextFloat()) * 0.2F));
    }
    //...
}

Can confirm in 1.18.1.