DIH: parentDeltaQuery fail updating the parent entity

In the delta-import the parentDeltaQuery is suppose to update the parent entity.
I don't think this is working properly.

I realized that it's just executing the parentDeltaQuery with the first record of the deltaQuery result.

This means that if the deltaQuery returns a set of ID to update, just the first will be used in the parentDeltaQuery.
As result of it just a few parent entity will be update correctly