Block placement on leaves frequently fails on first attempt

Summary:

When placing blocks on leaves, the placement will often fail on the first attempt, requiring the player to place the block a second time. The block briefly appears and then disappears.

This issue makes building with leaves (such as creating large custom trees) more frustrating and time-consuming due to inconsistent placement behavior.

The issue was introduced in 26.20.21 Preview and does not occur in 26.3 or earlier Preview versions.

Steps to Reproduce:

Note: The following steps provide a quick and consistent reproduction method. The issue can also occur during normal building, as described above.

1. Open chat and run the following command:
   /fill ~15 ~ ~15 ~-15 ~ ~-15 leaves

2. Place a small platform of leaves directly on top of the generated leaves.

3. Break a leaf block from the platform created by the /fill command.

4. Wait for the leaves to decay.

   • To speed up the process, increase the randomtickspeed gamerule, then reset it to normal.

5. Attempt to place a block on the small platform of leaves.

Observed Results:

The block is placed briefly and then disappears, requiring a second placement attempt. If the world is reloaded before placing the block, the issue does not occur until the steps above are repeated.

Expected Results:

Blocks should place successfully on the first attempt and remain in place, matching the behavior in previous versions.