When 100% of the player is underwater the water breathing on a turtle shell helmet goes away

turtle shell is meant to grant only 10 seconds of watee breathing.

Thank you for your report!
However, this issue has been closed as Working as Intended.

Remember not all differences between game versions/platforms of Minecraft are bugs. If you need help or have a suggestion you might like to follow a link below.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki