Yes, it is true. My tilt angle is 0 degrees since my field type is Tracking, horizontal N-S and has Azimuth of 0 degrees too. This is not the first time simulating with this orientation, but it is the first time I am getting a 0% percent on Global Inc. in coll. plane. I looked into it and found out that maybe the transposition model may contribute, but my transposition is on Hay Model and the meteo file is PVGIS.TMY.
And the problem persists.
I have attached my orientation board just incase.