No Damage Taken While Riding Wither or Ender Dragon in Survival Mode

Steps to Reproduce:

1. Switch on cheats in a world.

2. Summon a Wither or Ender Dragon.

3. Mount the mob using a /ride command, or data pack anything etc.

4. Switch to Survival mode while still mounted.

5. Let the mob attack or fly through hazardous terrain.

Expected Result:
The player should take damage normally in Survival mode when targeted or affected by hostile mobs or hazards.

Actual Result:
While riding the Wither or Ender Dragon in Survival mode:

• The mob detects and targets the player.

• Attack animations and effects play normally.

• However, the player takes absolutely no damage — health remains completely full.

• Upon dismounting, the player immediately dies, even without taking apparent hits.

Key Notes:

• This is not a damage delay — no damage is applied at all during the ride.

• The bug is 100% reproducible.

• Could be exploited in a cheated environment even in Survival or Hardcore to avoid death entirely by staying mounted.

🔗 Video Proof:
https://www.youtube.com/live/c2MSbwXidPU?si=ijT5WBUMb7LFek4U

🌍 Environment:

• Minecraft: Java Edition 1.21.6

• Singleplayer

• No mods

• Tested on Windows 11, Java 17