when we swim down on the edge of a block the character is blocked

Thank you for your report!
However, this issue is Incomplete.

Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.
If your ticket does not look like the example given here, then it's likely to be closed as incomplete.

Also, we'd recommend making use of the search feature before writing a new bug report, as it's very likely that the issue has been mentioned already, and you can add a vote and any new information to the main ticket.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki