When you eat a food and finish eating just when you teleport or not even finish eating, your game will glitch and stay on loading terrain. It would then crash and when you go back in you would be already dead or swimming in lava
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duplicates
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We're tracking this issue as MCPE-54519, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Fixed, you can check the Fix Version/s field in that ticket to learn more.