DMM7510 Parameter dmm.digitize.inputimpedance in 100V range does not work as described in the d

The digitize 100V range behaves very strangely.
For example, I see a reaction from a change in input resistance.

Short input noise:
At 10 MΩ - 750 μV
At Auto - 65 μV

Input band:
At 10 MΩ - 17.5 kHz
At Auto - 7.5 kHz

Is there any difference between 10 MΩ and Auto?
If you select a range of 1000V there is no such effect.

Hello,
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I created.