? character instead of comma (,) in Swami Sivananda commentaries

[ravisiyer]

There seems to be a problem with the data associated with Swami Sivananda commentaries. Question mark character (?) appears frequently in places where I think there should be a comma character (,).
If you use this query, "
{
allGitaLanguages {
nodes {
language
}
}
allGitaVerses(condition: {chapterNumber: 10, verseNumber: 4}) {
nodes {
gitaCommentariesByVerseId(condition: {authorId: 16}) {
nodes {
description
authorName
authorId
}
}
}
}
}
" (copy-paste without double quotes) in https://gql.bhagavadgita.io/graphiql, you can see that the result has the ? character issue.

But IIT Kanpur's Gita Supersite which seems to be the original source of this data, does not have this issue (instead of those ?s, we have commas) - https://www.gitasupersite.iitk.ac.in/srimad?language=dv&field_chapter_value=10&field_nsutra_value=4&ecsiva=1&etsiva=1