With the new UI update there's a little animation where the server icon for the server you're changing to bounces up and down when you press it, which is. . . fine I guess, though it doesn't really add anything. The issue though is that Discord does not change servers until this animation is finished, and the animation takes somewhere between a tenth and an eighth of a second to complete.
This is annoying as Hell and completely deleterious.
Please remove this delay, or at least make some way to remove this delay as an option.