Coral blocks take too long to break

This sounds more like a suggestion than a bug.

That's how it works in the Java edition

Present in 1.14.30

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Reproduced in 1.16.40. In JE coral blocks take about ~7sec to break by hand, in BE ~35sec. The hardness value in BE is 7.0 instead of 1.5 as per JE.

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response

Is this still an issue in the latest version? If so, please make sure the ticket description contains the following information:

Steps to Reproduce:
1.
2.
3.

Observed Results:
(Briefly describe what happens)

Expected Results:
(Briefly describe what should happen)

If your ticket does not look like the example given here, then it's likely to be closed as incomplete.

This ticket will automatically reopen when you reply.

Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki

Still an issue in 1.17.10.

Fixed in 1.20.20.21 Preview