Pink Petals hitbox does not adjust to contents

The bug

23w07a introduces pink petals, a block which can have up to four instances of itself placed in a single block space. This puts it in a family also inhabited by turtle eggs, sea pickles and candles.

Turtle eggs, sea pickles and candles start out with a small hitbox when they contain one instance, and this hitbox expands dynamically to accommodate an increased number of units within. However, for the pink petals block, this hitbox will remain constant regardless of how many are inside of it.

How to reproduce

1. Place one turtle egg

2. Place a second turtle egg in that block space

3. Place one sea pickle

4. Place a second sea pickle in that block space

5. Place one candle

6. Place a second candle in that block space

7. Place one pink petals

8. Place a second pink petals in that block space

Expected results

When the second instance is added, each of the blocks would change their hitbox.

Actual results

This is true of the first three, but not of the fourth.