In 1.13 and it's snapshots I have a problem. When I press W and Ctrl to sprint the game hesitates and starts sprinting after about 1 second or not at all. I have to release and press them again for it to work. Also happens when flying in creative mode. If W is pressed about half a second before Ctrl there is no problem. This doesn't happen in 1.12.2 or older. It is very annoying!