What Edition of the mod are you using?

The Minecraft platform that that issue is taking place:
Datapack edition.

Describe the bug

1. Cannot place blocks above the cake
2. Pushing the cake block with a piston (sticky & normal) will not remove the armor stand until it is retracted.
3. You can place another custom cake on top of a cake to create double-stacked cakes.
4. Placing cake on any non-full block will get replaced.
5. You can place a cake on the side of a block to make it float.

To Reproduce

Steps to reproduce the behavior:

Issue1

1. Place the custom cake block.
2. Try placing any block above it.
3. The block cannot be placed.

Issue2

1. Place the custom cake block.
2. Place a piston (sticky or normal) next to the placed custom cake block.
3. Activate the piston to push the custom cake block
4. You can see the ghost block or armor stand is inside the piston head.
5. When you retract the piston the armor stand then gets removed.

Issue3

1. Place the custom cake block.
2. You can then place another cake on top.

Issue4

1. Place/find any non-full block, ie; flowers, beds, etc
2. Place the custom cake ontop of the non-full block.
3. The non-full block will get replaced with the cake.

Issue5

1. Place the custom cake block on the side of a block
2. You can see that the cake is now floating.

Expected behavior

A clear and concise description of what you expected to happen.

Issue1

The block is placed on top of the custom cake block.

Issue2

The cake (and armor stand) is removed.

Issue3

You cannot place a cake on top of another, Like in vanilla Minecraft.

Issue4

The cake cannot be placed, will not replace the block.

Issue5

The cake is not floating in the air.

Desktop (please complete the following information):

• Minecraft Version: 1.16.5
• Mod Version: v3.1.0
• OS: Windows 10

In addition, the birthday candles do not display properly on top of the cake blocks. They show a black candle with a purple tip, regardless of the color of candle.