When you go into your Singleplayer map selction and you havn't as much maps as you need to scroll down in your window, the maps will start to go up and down very quickly.
MC-50997
Singleplayer map selection glitch
Resolved
Duplicate
0
Duplicate of MC-50965 – If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.