Falling blocks are no longer visible when Ray Tracing is turned on.

Steps to Reproduce:

1. Enter any world with Ray Tracing activated
2. Place a falling block (such as sand or gravel) over a drop and observe
3. Toggle Ray Tracing off
4. Place a falling block (such as sand or gravel) over a drop and observe

Observed Results:

When the placed block turns into a falling block, it is completely invisible when Ray Tracing is on.

Expected Results:

Falling blocks should retain their full functionality regardless of graphics options, where they should be completely visible with Ray Tracing on as it is when it is off.

PBR resource pack used: https://www.mediafire.com/file/ngisqn3mkjn4c44/Defined_PBR_v1.1.5.mcpack/file