Livewire lost model - When I edit delete the model is lost

Hello partners. Let's see if you can give me a hand. I've been dealing with this issue for 3 days now and I can't find a solution.

It turns out that I have a crud section. These sections are created well, edited well, and deleted well. The problem comes when I edit a section, for example the first one, you delete another section. You go back to edit another one. and you delete, it fails here. Mysteriously the model disappears.

throwing an error "Livewire\Features\SupportLegacyModels\EloquentModelSynth::setDataOnModel(): Argument #1 ($model) must be of type Illuminate\Database\Eloquent\Model"

I have legancy_model_bending enabled.

I leave you the source code, I hope you find a solution.

Sorry, it especially happens when you edit the first row, save, delete and later delete the 2nd row. error occurs

@foreach ($course->sections as $item)

    <article class="card mb-6" x-data="{open: true}" wire:key="sections-{{ $item->id }}">
        <div class="card-body bg-gray-100">

            @if ($section->id == $item->id)
                <form wire:submit="update" class="flex justify-between items-center">
                    <input wire:model.live="sectionEdit.name" class="form-input w-full" placeholder="Escribe el nombre de la sección">
                    <div>
                        <i wire:click="cancel" class="fa fa-ban cursor-pointer text-blue-500 ml-2"></i>
                    </div>
                    @error('sectionEdit.name')
                        <span class="text-xs text-red-500">{{$message}}</span>
                    @enderror
                </form>
            @else
                <header class="flex justify-between items-center">
                    <h1 x-on:click="open = !open" class="cursor-pointer">
                        <strong>Sección:</strong> {{ $item->name }}
                    </h1>

                    <div>
                        <i class="fas fa-edit cursor-pointer text-blue-500 mr-2" wire:click="edit({{ $item->id }})"></i>
                        <i class="fas fa-trash cursor-pointer text-red-500" wire:click="deleteSection({{ $item->id }})"></i>
                    </div>
                </header>
                <div x-show="open">

                </div>
            @endif

        </div>
    </article>

@endforeach

<div x-data="{ open: @entangle('isOpenSection') }">
    <a x-show="!open" x-on:click="open = true" class="flex items-center cursor-pointer">
        <i class="far fa-plus-square text-2xl text-red-500 mr-2"></i>
        Agregar nueva sección
    </a>

    <article class="card" x-show="open">
        <div class="card-body bg-gray-100">
            <h1 class="text-xl font-bold mb-4">Agregar nueva sección</h1>

            <div class="mb-4">
                <input wire:model.live="sectionCreate.name" class="form-input w-full" placeholder="Escribe el nombre de la sección">
                @error('sectionCreate.name')
                    <span class="text-xs text-red-500">{{$message}}</span>
                @enderror
            </div>
            <div class="flex justify-end">
                <button class="btn btn-danger" x-on:click="open = false">Cancelar</button>
                <button class="btn btn-primary ml-2" wire:click="store">Agregar</button>
            </div>
        </div>
    </article>
</div>

Component

public $course;
public $section;
public $flashVisible = true;
public $isOpenSection = false;

public SectionsCreateForm $sectionCreate;
public SectionsEditForm $sectionEdit;

public function mount(Course $course){
    $this->course = $course;
    $this->sectionCreate->course = $course;
    $this->section = new Section();
}

public function render()
{
    return view('livewire.instructor.courses-curriculum')
        ->layout('layouts.instructor', ['course' => $this->course]);
}

public function cancel(){
    $this->section = new Section();
}

public function edit($sectionId){
    $section = Section::find($sectionId);
    $this->resetValidation();
    $this->section = $section;
    $this->sectionEdit->edit($section);
}

public function update(){
    $this->sectionEdit->update();
    $this->section = new Section();
    $this->course = Course::find($this->course->id);
}

public function store(){
    $this->sectionCreate->save();

    $this->course = Course::find($this->course->id);

    // Cerramos el panel
    $this->isOpenSection = false;
}

public function destroySection($sectionId){
    $section = Section::find($sectionId);
    
    $section->delete();

    $this->course = Course::find($this->course->id);
}

class SectionsCreateForm

class SectionsCreateForm extends Form { #[Rule('required')] public $name;

public $course;

public function save(){
    $this->validate();

    $section = Section::create([
        'name'          => $this->name,
        'course_id'     => $this->course->id
    ]);

    $this->reset(
        'name'
    );
}

}

class SectionsEditForm

class SectionsEditForm extends Form { #[Rule('required')] public $name;

public $section;

public function edit($section){
    $this->section = $section;
    $this->name = $section->name;
}

public function update(){
    $this->validate();

    $this->section->update(
        $this->only('name')
    );
 

    $this->reset(
        'name',
    );
}

}