With graphics set to Fabulous!, blocks such as honey, slime and stained glass appear lit up in third person mode

The bug

When held in F5 mode, honey and slime blocks, as well as stained glass appears fully lit up in the dark. This isn't an issue in 1.16.5.
Screenshots show comparison between 1.16.5 and 21w11a. This does only happen with graphics set to Fabulous!