中文（Chinese）：

我是用的快照版本：20w18a，在今天更新到20w19a时候也发生了一样的问题：

用桶从水里面拿了水后就无法再将其倒回水里，只能放在坑中用其他方块来填补它使其消失。在1.15.2的版本中则正常可以将水倒回。

翻译（Translate by Google）：

I used the snapshot version: 20w18a, the same problem occurred when I updated to 20w19a today:

After taking the water from the bucket with water, it can not be poured back into the water. It can only be placed in the pit and filled with other blocks to make it disappear. In version 1.15.2, the water can be poured back normally.