Screen turns black when crawling in 3rd person mode

Crawling is a very useful feature. Using it, I found quite a few diamond ores in my world! But one thing that doesn’t make sense is that the screen turns pitch black when you do this whilst in 3rd person mode, even if I have night vision potions.

How to reproduce:

1: swim into a 1-block high area

2: go into 3rd person mode