This is weird. We are investigating this.
For now use this temporary solution
some(func: has(__User)) @filter( eq(isActive, true) AND (not has(__deleted))) #optional
{
test(func: has(Question.Title)){
uid
Question.Title
Answer {
uid
answer.body
comment @filter(has(comment.body) ) {
uid
comment.body
}
}
}
}