ofDisableArbTex() and ofEnablePointSprites()

Is ofDisableArbTex() required to get point sprites to work? I can’t get anything to show up when I call ofDisableArbTex() before loading my image.

In my setup() i have:

    ofDisableArbTex();
    ofLoadImage(mTex,"texture.png");

in draw():

    mTex.bind();
    shader.begin();
    ofEnablePointSprites();
    mesh.draw(ofPolyRenderMode::OF_MESH_POINTS);
    shader.end();
    mTex.unbind();

In my fragment shader, no matter what I put for the texture coord, my points are black

uniform sampler2DRect tex0;
out vec4 outputColor;

void main()
{
    // outputColor = texture(tex0, gl_PointCoord)
    // outputColor = texture(tex0, vec2(200,200))
    outputColor = texture(tex0, vec2(.5,.5));
}

If I don’t call ofDisableArbTex(), I can retrieve colors using the pixel coordinates, but my points draw as a single color, not the entire texture image.

Is there a bug here or am I doing something wrong? Edit: I am setting the point size in my vertex shader already.

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