Export: comments.csv missing comment ID and associated activity/post/flag/… ID

When I export my Strava data, one of the files is `comments.csv`. However, there are only two columns in that CSV: `Comment Date` and `Comment`. No `Comment ID`, `Associated Entity Type` and `Associated Entity ID`. So basically, just a wall of dated text. Almost perfectly useless.

How can I get the comments in their original context?