End portal and experience orbs do not generate after defeating the Ender Dragon

After defeating the Ender Dragon, the game fails to complete the normal post-battle process. Although the dragon performs the death animation correctly, it does not ascend as expected. Once fully disintegrated:

• No experience orbs are released

• The return portal to the Overworld does not generate

• If the player remains in the End without dying or falling into the void, the game’s performance steadily degrades, eventually reaching unplayable frame rates (1–2 FPS)

• Issue has been consistently reproduced across multiple worlds and fresh saves

Steps to Reproduce:

1. Create a new Survival world

2. Reach the End dimension

3. Defeat the Ender Dragon

4. Observe the lack of experience and missing portal

5. Stay in the End without dying or exiting

6. Notice progressive FPS drop and world instability

Expected Behavior:

• The Ender Dragon should release experience orbs

• The exit portal to the Overworld should automatically generate

• Game performance should remain stable after defeating the dragon

Observed Behavior:

• No experience is awarded

• No exit portal appears

• Game becomes increasingly unstable if the player stays in the End