AD8227 does not work well on LTSpice


I try to use AD8227 spice model on LTSpice , but it does not work well.

The condition is below:

VDD:3.3V, Reference:1.65V, Vcm:1.65V, Bandwidth:100Hz (0.001V)

When the Rg setting is under 111 ohm, the work does not finished.

And when the Vcm is 0.3V to 3.3V, the spice model does not work with any Rg setting.

AD8421 works well on LTSpice.

Are there any tips of this problem?