Describe the bug (actual behavior)

The bottom of the options list shows a gap below the last option when using a virtualized combobox where the second option has a sublabel and a sufficient number of options without sublabels.

Expected behavior

The bottom of the options list stops at the last option.

Reproduction

Link to a minimal repro: https://codesandbox.io/s/gracious-pond-ur3c5g?file=/src/App.tsx

Steps to reproduce

1. Open the combobox
2. Observe gap below the last option

Additional information

This occurs in both scrollable and unscrollable option lists.
It appears the gap is the result of the scrollable distance being calculated as if every option has a sublabel, accumulating all the height differences from all options without sublabels at the bottom.
Testing seems to suggest this only occurs when the second option has a sublabel.