- Sprint by holding forwards and holding CTRL
- Punch a mob
- This will briefly interrupt your sprint, but you'll automatically start sprinting again
- You're now sprinting clientside but not serverside
- No hunger lost by "sprinting" this way as it counts as walking; other (modded) things that detect sprinting serverside will thus also not activate in this state (like "Piston Boots" from "Adventure Backpack" giving speed effect while sprinting)
MC-69459
I believe this is a good candidate for getting fixed by this mod as it's a somewhat noticable bug that's present in vanilla, but I'm not sure how easy it would be to fix.