Can't use my sprint key and jump at the same time
Solution 1:
It's likely to do with the fact that you're holding ctrl to run. There are a few issues with this:
- ctrl+space is a recognised keyboard shortcut in most systems. Minecraft is not one of them however, so this is likely part of your problem.
- In Minecraft, the ctrl to sprint function is actually an "on/off" switch. Hit it once (while moving) to start sprinting, hit it again to stop sprinting. Holding it is likely screwing with your keyboard input when you attempt to jump.