When the player is on lava, the player's mark gets green

Hi, People at Mojang!

I was exploring the new caves in creative mode, and when I was digging straight down, I found myself on lava, but, my mark/point of the screen turned green, and that's not normal I guess. Here are the prints:

I hope this is an easy-to-fix minor bug because I know that Bedrock is full of major ones, and I want it to be as good as Java Edition!

By the way, I was with the Night Vision potion.