Hit result is shown empty even though it has data in lvl1 property of hit

## Description

With the version 2, it was showing all results correctly with the default UI. After upgrading to v3, it shows some results empty. Even though it has lvl1 info in the found hit.

- DocSearch version: 3.0.0-alpha.41

See the images for the difference

No source file or test is identified in the report. Start by reproducing the empty results with DocSearch 3.0.0-alpha.41 and compare the v2 and v3 default UI behavior, focusing on hits that contain lvl1 data; done means those hits display their available content.

Written by the indexing model from the issue text.