Bug with Squeeze factor in 5.1 Preview

I have been trying to create accurate real-world lenses with the new 5.1 update since the option of squeeze factor and crop has been added.

I want to have my cinecamera mimic a full frame anamorphic lens. The camera would be a Sony Venice, so the sensor is set to 36 x 24 with a 2.39 crop on it. I noticed when adjusting the squeeze factor from 1 to 1.6 there is a noticeable difference in the view, when it comes to adjusting from 1.7 to 2 howevere, there is no difference between them that I can see.

Is anyone else experiencing similar issues? Any other advice on accuracy with real world camera equivalents?