LTspice unlogical DC offset
You need resistors to ground on these inputs to keep the input dc bias from just charging up the capacitors. In other words it's bad design and won't work.

They may be limiting at 0.7 volts because the model has internal protection diodes in place. See note 2 in the data sheet: -


  Note 2: The inputs are protected by back-to-back diodes.


This means that if the inverting input is at 0V then the non-inverting input is clamped one diode drop higher.