Sometimes ruined portals generate underwater so they are useless.
Attachments
Comments 2
Thank you for your report!
However, this issue is Working as Intended.
The report you have submitted is working as intended: see https://www.minecraft.net/en-us/article/minecraft-snapshot-20w16a.
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 – Feature Requests and Suggestions
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
This is intentional