Some items do not lie in the Armor Stand's hand

Summary:
Some items (most) do not lie in the Armor Stand's hand. There is space between the hand and the item, so the item flies.

• Brush
• Crossbow (MCPE-118619)
• Bow
• Banners
• Disc Fragment
• Sunflower
• Lightning Rod
• Chain
• Flower Pot
• Decorated Pot
• Firework Charges
• Fire Charge
• Name Tag
• Redstone Repeater
• Redstone Comporator
• Redstone Dust
• Gunpowder
• Sugar
• Glowstone Dust
• Buttons
• Enchanted Books
• Book
• Boats
• Boats with Chest
• Amethyst Shard
• Prismarine Crystals
• Conduit
• Bell
• Cauldron
• Anvils
• Beds
• Lectern
• Music Discs
• Brewing Stand
• Grindstone
• Shears
• Snowball
• Slimeball
• Nether Wart
• Bowl
• Rotten Flesh
• Sugar Canes
• Egg
• Fishes
• Rabbit
• Chicken
• Amethyst Bud (MCPE-128027)
• Small Dripleaf
• Big Dripleaf
• Hanging Roots
• Kelp
• Lapis Lazuli
• Dues
• Ink Sac
• Nether Sprouts
• Sweet Berries
• Potato
• Carrot
• Seeds
• Wheat
• Beetroot
• Fence Gates
• Glass Panes
• Fences
• Walls
• Arrows
• Horse Armor
• Saddle
• Maps
• Paper
• Bread
• Ingots
• Bricks
• Rabbit's Foot
• Emerald
• Clay
• Gold Nugget
• Ghast Tear
• Netherite Scarp
• Scute
• Raw Iron, Gold, Copper

Steps to reproduce:

1. Place an armor stand.
2. Put the above items in the arm of the armor stand.

1. Import the world My World.mcworld .
2. Look at the connection between the items and the arm of the armor stand.

Observed results:
Items do not touch the armor stand.

Expected results:
Items must at least touch the armor stand.

Screenshots: