Blinking Screen while switching to swim mode (Ctrl Press in water)

Thank you for your report!
However, this issue is a Duplicate of MC-186091.

Please use the search function in the future to prevent duplicate reports.

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

Also Pink particles underwater (not blue)