NVDA has issues reading options

NVDA can read options very oddly, even breaking apart words or omitting parts of words altogether. Using the first example on the homepage ("Single"), here is the NVDA / Firefox output from initial focus through using ↓ to navigate through the list. Note issue #1585 is still present in this readout.

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option Ocean focused, 1 of 10. 10 results available. Use Up and Down to choose options, press Enter to select the currently focused option, press Escape to exit the menu, press Tab to select the option and exit the menu.
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Blue focused disabled, 2 of 10. 10 results available. Use Up and Down to choose options
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Purple focused, 3 of 10. 10 results available. Use Up and Down to choose options, press Enter to select the currently focused option
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Red
4
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Orange
5
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Yellow
6
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Green
7
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Fo
st
8
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Slate
9
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i
ver
10

VoiceOver / Safari reads this sequence as expected.

edit: This comment in a related issue describes what could be the issue and the fix.

Reproduce the first homepage example with NVDA and Firefox, moving through the options with the Down arrow and comparing the spoken output with VoiceOver and Safari. Read issue #1585 and the linked comment in issue #3353 for the existing related behavior and proposed fix. Done means option labels are spoken completely and consistently while preserving the expected navigation instructions.