Laravel Form Multiselect Not Showing More Than 1 Column

Hi Experts,

I'm having trouble creating a mulitselect  Laravel form to show multiple columns. This is my current setup:

Controller:

public function edit($id)
    {
        //

        $user = User::findOrFail($id);
        $assets = Asset::all()->pluck('id', 'asset_name')->toArray();

        return view($_ENV['VIEW_FOLDER_VERSION'] . '/views/users/edit', compact('user', 'assets'));
    }

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Blade:

<div class="form-group">
        {{Form::label('assets', 'Assets')}}
        {{Form::select('assets[]', $assets ,null,array('multiple'=>'multiple','name'=>'assets[]','class'=>'form-control'))}}
      </div>

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MySQL Table


This is what I see:


Can you please help point me in the right direction?

Thanks,
Ricky