Not sure how widespread this is, but of the handful of comments I know should be there, all are missing. I should clarify, the entries are there to show that comments were made, but the text is not.
e.g. here's the Crazy Kong track (https://www.twingalaxies.com/game/crazy-kong-set-1/mame/points#discussion)
I
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Updated 08-19-2018 at 05:29 PM by terencew