The End from the 18w50a did not load the ender dragon and the end portal to return to the overworld, and when an "End Crystal" is placed, the portal is automatically generated and active.
Related issues
Attachments
Comments

[media]

Thank you for your report!
However, this issue is a Duplicate of MC-137467.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki

Okay thanks.