The game can back to the old UI temporarily by "addExternalServer" link

Steps:

1. Keep the game running

2. Enter the link in your browser: minecraft://?addExternalServer=0|0:0 (You can replace the ”0”with something else)

Expected result:

The game redirects to the “Servers” page with New UI

Actual result:

The game redirects to the “Friends” page with Old UI