Essentially, i imported a creative superflat world from 1.17.1 to 1.18.1, and was messing around with tnt and end crystals and found that after i swapped from creative to survival, i was immune to explosions. I thought this was odd, so i created a new world and tested it out and i died to the explosions. i went back to the original world but was still immune to end crystal explosions.

What I expected to happen was...:
I should have died from the TnT and End Crystal Explosion.

What actually happened was...:
I took no damage.

Steps to Reproduce:
1. Load into a world created in version 1.17.1 while running version 1.18.1
2. Place obsidian and an end crystal on top of it.
3. See the explosion, and see that you took no damage.