The bug
Whenever you enter a portal (nether or end), normally a message that says Entering the nether and/or Leaving the end would appear. It's been happening ever since singleplayer became multiplayer-managed in 1.3.
How to reproduce
Create a nether portal or repair an end portal
Enter the portal
Linked issues
is duplicated by 1
relates to 1
Comments 64
How is this a duplicate of MC-233? That issue is about sound, not messages, and @unknown has said in the comments of that issue that this is a separate issue.
Duplicate of MC-2097. Please use the search function to check before posting in the future.