When logging out of a world, server, or realm, there is an unusual amount of time staring at dirt block background before loading up the main screen. Also, whenever a minecart goes over a powered rail, it jumps several pixels. Then when off the rail it drops back to normal. Switching to earlier versions removes this issue.
Linked issues
Comments 3
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them.
For the first issue please attach the complete content of the "Game Output console" of the Launcher.
Can confirm - any world or multiplayer server at 1.8.7 will receive an ~ 10 sec logging off dirtblock background when exiting and returning to main menu. Switching to 1.8.6 removes issue.
Have not tested minecart issue.