Clipper circuit with using ADA4851

Hi , 

I am checking a Clipper circuit  with ADA4851. 

And when simulate with various voltage , I find a relation between the Voltage at non inverting and supply voltage .

When using in 0-5V supply , +3V at non inverting terminal i see that the out is clamped but is looks different , is this expected .

I do understand the circuit in open loop when the diode is off . 

Thanking you 

With best regards and wishes