It get black when I swim under blocks in Windows 10 VR(Oculus rift version)

Summary:
It get black when I swim under blocks in VR, especially Immersive mode 

Steps to Reproduce:

1. Turn to immersive mode
2. Dive into water
3. Press sprint and go under blocks

Observed Results:
It became black and make me unable to see anything

Expected Results:
It should not get black 

It makes exploring ocean-cave almost impossible

Here are video and screenshot when it occurs

2021_05_20-19-47-16.mp4

Please take a look and fix it.