Collection results missing fields

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I have 15 fields in the collection Prices.

For the columns I use a render function

render: function (val, type, doc, meta) {
// render documentation
// https://datatables.net/reference/option/columns.render
return renderTicker(val, doc);
}

When I console.log('render doc:' + JSON.stringify(doc)) there are only 9 fields in the doc parameter.

Using the ephemer:reactive-datatables component all 15 fields from the Prices collection are shown in the console.log('render doc:' + JSON.stringify(doc).

What could possibly be causing this strange behaviour?

Start by reproducing the issue with the 15-field Prices collection and inspect the render callback's doc value, then compare it with the ephemer:reactive-datatables behavior. The issue is resolved when the cause of the missing six fields is identified and the expected collection fields are available consistently or the limitation is clearly documented.

Written by the indexing model from the issue text.