AlignPosition/Orientation only working on some pets (models)

Hi there!

I’m currently working on this game, which has a pet system, which essentially gives a player a boost. However, for some reason with some of the pets, they just fall straight through the map and get destroyed, but others don’t.

This is the current code that the system uses to equip a pet:

for n,pet in pairs(EquippedPets) do
		if n > PlayerData.MaximumEquippedPets then continue end
		local Attachment ="Attachment")
		Attachment.Parent = RootPetAttachments
		Attachment.Name = tostring(n)
		Attachment.Position =[n%3],-1.5,math.round(((n+1) / 3))*3)
		local PetModel = Service:FetchPetModel(pet)
		if not PetModel then continue end
		Attachment.Position =[n%3],PetModel:GetAttribute("Type") == "Air" and 1.5 or -1.5,math.round(((n+1) / 3))*3)
		PetModel = PetModel:Clone()
		PetModel.Parent = Attachment
		PetModel.PrimaryPart.Anchored = false
		for _,part in pairs(PetModel:GetDescendants()) do
			if part == PetModel.PrimaryPart then continue end
			if part:IsA("BasePart") then
				part.Anchored = false
		local newAttachment ="Attachment",PetModel.PrimaryPart)
		newAttachment.Visible = false
			local primary = PetModel.PrimaryPart

			if primary then

				local AlignPosition ="AlignPosition")
				AlignPosition.MaxForce = 25000 
				AlignPosition.Attachment0 = newAttachment --primary:FindFirstChildWhichIsA("Attachment") or"Attachment",primary)
				AlignPosition.Attachment1 = Attachment
				AlignPosition.Responsiveness = 25 
				AlignPosition.Parent = PetModel

				local AlignOrientation ="AlignOrientation")
				AlignOrientation.MaxTorque = 25000 
				AlignOrientation.Attachment0 = newAttachment --primary:FindFirstChildWhichIsA("Attachment") or"Attachment",primary)  
				AlignOrientation.Attachment1 = Attachment
				AlignOrientation.Responsiveness = 25 
				AlignOrientation.Parent = PetModel


Everything is working, including the attachments, but for some reason, some of them just fall straight through the ground, but others don’t.

If anyone has any ideas, please let me know, thanks!