Water buckets cannot be emptied into water source, but still plays the sound effect

Before 20w18a, you could empty a water bucket by placing it into a water source. Now, however, when placing it into a water source, it still plays the water bucket empty sound effect, but the bucket remains full.

Steps to recreate:

1. Get a full water bucket
2. Get a water source
3. Use the water bucket on the water source