Changing hitbox size underwater from 1x1 to 1x2 causes the screen to flicker black for a moment sometimes.

Thank you for your report!
However, we are already tracking this issue, and this report 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