When you change dimension,the scoreboard becomes invisible (both of them list and sidebar) and you have to re-log in the server or leave and join in a world.
(I didn't test survival)
MC-8358
Dissapearing scoreboard
Resolved
Duplicate
0
Nico A
(Unassigned)
Unconfirmed
Snapshot 13w04a
Retrieved
Duplicate of MC-8186, please use the search function to see if your bug has already been submitted. Currently over 49% of tickets are being closed as duplicate.