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The wiki lists Lightning Reflexes as a bonus feat for derro, but they are not receiving this bonus feat. It is unclear whether this is an error in the wiki or an error in the game. The balance implications of receiving or not receiving this feat seems mostly restricted to how easily derro are able to take the Invisible Blade class.
This page lists Lightning Reflexes as a bonus feat for derro: http://wiki.nwnarelith.com/Derro
But they are not receiving it:
Steps to reproduce
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Make a derro
Expected result
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Receive Lightning Reflexes feat
Actual result
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Do not receive Lightning Reflexes feat
Which Server(s)?
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PGCC