Since both the passenger and itself(nautilus or zombie nautilus) are already fully exposed to the air, providing breath of the nautilus effect is unreasonable.
MC-302960
Riding a stranded nautilus or zombie nautilus grants the player a breath of the nautilus effect
Resolved
Works As Intended
1
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.
Full Version History – Snapshot Version History – The official Minecraft feedback site
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki