Axolotls and Glow Squids can spawn in the End (and in the Nether)

Summary
The Axolotl and the Glow Squid can spawn in the End (and if there's water present in the nether somehow), which is not supposed to happen in the first place.

Step to Reproduce
1. Go to the End, fill a part of the End with water.
2. Place the blocks above the filled water, make sure to cover the entire area.
3. Wait them to spawn, you may have to do /kill @e to clear mobs out.
---> Axolotl/Glow Squid spawn in the water in the End.

Original Description
I created a water pool in the end on MCBE Realms 1.17, and Axolotls and Glow Squids are spawning in there. Which is cool, but I think shouldn't happen in other dimentions than the overworld