tree.path returned an empty path; the affected rows were placed at the root.

Warnings reference › tree.path.empty

Identifier

tree.path.empty

Raised by

The grid (core)

Since

1.0.1

What happened

A row's path is an empty array (or not an array at all), so there is no branch to put it under. It is placed at the root rather than dropped, so the data is still visible.

The fix

Return at least one segment per row. A row that genuinely belongs at the top level should still name itself.

Reference

Covered in full at the API reference.