AMC1301: Two isolated OpAmps supplied by the same floating power supply measuring opposite voltage potential

Hello,

I've got a DC-bus split in the middle. Resistive voltage divider is symmetric, so applied voltage should split to two exacly the same values.

I want to measure positive and negative half of DC-bus voltage, so I've decided to use two AMC1301. HV side of both opamps is supplied from a power supply floating with the middle of DC-bus.

VINN is connected to the DC-bus middle point, which is tight to GND of the floating power supply. VINP of one opamp is tied to a 'positive' divider measuring resistor, and VINP of other opamp is tied to a 'negative' divider measuring resistor (see TINA circuit):

Although all resistors in voltage divider network are symmetric, opamps draw different current and their input voltage is therefore different.

I would expect the same voltage value but with opposite polarity at the input of both opamps.

TINA simulation results show, that my expectation is wrong:

Could you please confirm the simulation results folow component theoretical proper behaviour?

Can two AMC1301 supplied by the same floating power measure two different potentials refered to the same VINN (ground)?

Thanks

Petr