Mappings caveat or hidded beahaviour or bug with complex json about benthos

[mihaitodor]

Hey @sviyh 👋 I'm really struggling to reproduce the issue you're seeing. At a quick glance, the bloblang code you shared above isn't valid, since the keys in the issue object you're trying to create aren't double quoted. For example, this works just fine:

root.issue = {
  "self": this.self,
  "id": this.id,
  "key": this.key,
  "creator": this.fields.creator.displayName
}

You'd get nulls if the input message doesn't have the fields which are being referenced via this, but I'm not sure how to reproduce the error you're seeing.

LE: Moving to a discussion as per #2026.