Jira card: https://jira.unity3d.com/browse/GFXGI-544

1) Open HDRP template project
2) Enable the Baked Lightmap view

Expected: We can see the baked lightmap data
Actual result: View does not display baked lightmap data anymore

Note: Rebaking did not help

Regression:
In unity 2021.2.0a15 the view was working fine

The feature stopped working when the project was opened with:
Version: 2021.2.0a17.2323
Revision: trunk a2a2b9196a1f
Built: Sun, 02 May 2021 13:50:08 GMT

Notes:
- The issue only affects Scene view lightmap visualization filters; Baked lightmaps work as expected.