Affects Version/s: Minecraft 1.13-pre8
Fix Version/s: None
Java 1.8.0_51 64 bit
Intel Core i7-6700K
GeForce GTX 960
Debug (F3) screen in screenshot
Spam clicking water with a bucket quickly between two water source blocks can create holes in the water (screenshot).
Works both in creative and survival. Easiest in creative,
The holes are "repaired" when the game is restarted (save and quit > start world again).
The holes seems to affect swimming but not breathing.
Only tested in single player world.