The original bug report MC-263390 is resolved as "Invalid" because of "modded game". However, this issue can be reproduced without the use of mod(s).

This seems to not an issue when place powder snow bucket in cauldron or when place water and lava bucket.

STR (Steps to reproduce):

Step 1: Just place a powder snow bucket.

Expect: The bucket don't disappear and show normally, just how place water and lava bucket.

Reality: The bucket disappears.