DrawText produces wrong output

#include "ReShadeUI.fxh"

uniform float testfloat < __UNIFORM_SLIDER_FLOAT1
    ui_min = 0; ui_max = 1000;
    ui_step = 1;
> = 100;

#include "ReShade.fxh"
#include "DrawText.fxh"

float4 PS_DrawDigitTest(float4 pos : SV_Position, float2 texcoord : TEXCOORD) : SV_Target
{
    float res = 0;
    
    DrawText_Digit(float2(500.0 , 500.0), 32, 1, texcoord,  0, testfloat , res);
        
    return res;
}


technique DrawDigitTest
{
    pass {
        VertexShader = PostProcessVS;
        PixelShader = PS_DrawDigitTest;
    }
}